Need help asap please

Need Help Asap Please

Answers

Answer 1

While bases take protons in processes, acids donate protons (H+). While bases have a pH of 7 or higher, acids have a pH of 7.

What is the difference between Acid and Base?

While bases take protons in processes, acids donate protons (H+). While bases have a pH of 7 or higher, acids have a pH of 7. Acids release H+ ions while bases release -OH when they separate in water. While acids render litmus paper red, bases turn it blue.

1) In Experiment 1, the color of the solution changes from light (suggesting base) to dark when the acid is introduced (suggesting acid). As a result, adding the acid in this instance produced an ACIDIC solution.

2) In Experiment 2, the reverse is accurate. The hue stays light even after the addition of the acid (suggesting base). The outcome in this instance is BASIC as a result.

3) When the acid is given to the base to buffer it, this is Experiment 2. As you recall, a buffer solution is one that doesn't alter in pH when an acid or basic is introduced. We may infer that the addition of the acid in Experiment 2 was made to produce a buffer solution because it was done so the pH didn't fluctuate as much as it did in Experiment 1.

To learn more about Acid and Base refer to:

https://brainly.com/question/9836972

#SPJ13


Related Questions

14.
List of Terms:
A) Asia
B) Africa
Europe
North America
America
South
Middle East
3启面正西至395
1
15
G
Atlantic Ocean
H) Pacific Ocean
D
Indian Ocean
Southern Ocean
Mediterranean
Sea
16
18.
GLOBAL MAP
20
21.
19
17
22.
23.
24
25

Answers

Answer:

g

Explanation:

Can you take a picture of the assignment and post it

Provide information on the weather and climate of your biome Taiga

Give five abiotic factors and five biotic factors in your Taiga

Provide an example of how an abiotic factor affects a biotic factor in your biome.

Provide a food web for your biome starting with the Earth’s primary source of energy.

Provide examples of how humans are affecting your biome Taiga

Provide a conclusion of the ways humans can help protect your biome Taiga

Answers

The taiga is an important biome for the earth because there are many valuable species and clear waters there.

What is a Taiga?

The taiga is a biome that is characterized by having coniferous forests, being one of the largest forest masses on the planet.

How is the weather and climate in the Taiga?

The weather and climate of the taiga are characterized by being cold during most of the year, with temperatures ranging from 19°C to .30°C. Despite being cold, the rain pattern is not abundant because it averages 450mm.

What biotic and abiotic factors are there in the taiga?

The biotic factors of the taiga are:

Fish, birds, mammals, humans and plants.

The abiotic factors of the taiga are:

Rocks, water, snow, ice, winds, acid soil.

How does an abiotic factor affect a biotic factor in the taiga?

The abiotic factor that affects all the biotic factors of the taiga is water, since it is a necessary resource for the life of these organisms.

Taiga food web example

In the taiga everything begins with the ground, where plants and grass grow, this grass is used to feed some mammals such as reindeer and deer; these deer serve as food for other predators such as pumas, finally these pumas die and their remains become nutrients for the soil.

What effects is the human causing to the Taiga?

The human relationship with the taiga dates back to prehistory. However, during the last time it has caused a negative impact because it has contaminated the crystal clear water that is there. Additionally, the felling of trees has been exceeded, which has affected other species that live there.

How can humans take care of the Taiga?

Humans can take care of the taiga by implementing good sustainable practices with the environment. Avoid cutting down trees and not polluting the water.

Learn more about taiga in: https://brainly.com/question/26399845

Match the following structures and functions to the prokaryotes, please.

Answers

According to the options displayed, the answers are:

cytoplasm --> water based, jelly like substance within the cell.

nucleoid region --> contains the DNA

cell wall --> maintains shape

capsule --> surrounds cell wall and protects

flagella --> locomotion

pili --> hair like structures for DNA exchange

cell membrane --> primary barrier

What is it about Neasles that requires a high vaccination rate to prevent deaths?

Answers

In the first decade of reporting, an average of 6,000 measles-related deaths were reported each year. In the decade before 1963 when a vaccine became available, nearly all children got measles by the time they were 15 years of age.

HELP ASAP PLEASE

Maria has started a new diet that consist of consuming many fruits and vegetables each day. She is at your office to make sure that this new diet will aid in her goal of losing 10-20 lbs.
As a doctor. you will need to describe to Maria how a food molecule travels through the cell. Create a response to Maria that explains how a food molecule will pass through different organelles on its way to being hydrolyzed and converted into usable energy.
* You must use at least 4 organelles in your explanation to Maria.

Answers

The four organelles  through which the food molecule is hydrolyzed and converted into usable energy are Nucleus, cytoplasm, mitochondria , Ribosomes.

Cellular respiration

The process of converting glucose into a form of energy (ATP) that is useable by cells.The organelles involved in it are:

1. Nucleus

The nucleus, a substantial organelle that houses the cell's DNA (deoxyribonucleic acid), is referred to as the "command center" of the cell . All of the cell's functions, including growth and metabolism, are controlled by the nucleus. Thus, it commands cell to uptake the glucose.

2. Cytoplasm

The glucose when comes in cytoplasm undergoes glycolysis to form 2 molecules of pyruvate.

3. Ribosomes

These are protein forming substances and help in cell metabolism.

4. Mitochondria

The 2 molecules of pyruvate then goes inside the mitochondria to undergo TCA (Tricarboxylic acid cycle) which ultimately lead to the formation of ATP.

To know about Cellular respiration visit the link:

https://brainly.com/question/13721588?referrer=searchResults

#SPJ1

Which term best describes the change from more light-colored moths to more dark-colored moths?

Answers

Evolution describes the change from more light-colored moths to more dark-colored moths.

Evolution- Changes in heritable traits—an organism's hereditary characteristics—are the means through which organisms evolve. For instance, eye color is a heritable feature in humans, and a person may get the "brown-eye trait" through one of their parents.

Therefore, evolutionary biology enables us to understand not only how and why species have evolved into the forms they have, but also the processes that are currently modifying or changing them. A characteristic of evolution which is becoming more and more crucial in terms of the scientific input to societal challenges is the ability to adapt to change.

To know more about the Evolution, click on the below link,

https://brainly.com/question/9830102

#SPJ1

Open and closed systems are complete opposites of one another. All of the following are examples of open systems EXCEPT which
one?
O A pressure cooker
O A pot of pasta boiling on the stove with no lid
O A human being breathing in oxygen and exhaling carbon dioxide
O A fresh cup of hot coffee with no lid

Answers

The system that is not an example of an open system is the pressure cooker.

What is an open system?

Let us recall that both the open and the closed systems are the types of thermodynamic systems that we have. In effect, we could say that there are actually about two kinds of thermodynamic systems and these are the open system and the closed system. The open system is the system min which there is an exchange of materials and energy with the external environment while in the closed system, there is no exchange of material and energy with the external environment.

Having said this, whet we now have to look out for is the system where we do not have an exchange of material and energy. That sort of system does not qualify as an open system.

As such, the pressure cooker is a closed and not an open system.

Learn more about open system:https://brainly.com/question/12349841

#SPJ1

Will Give Brainiest.
Is the coloring of the peppered moths an example of competition, differential reproductive success, or inherited variation

Answers

Answer:competition

Explanation:

What do plant and animal cells have in common?
O plasma membrane, large vacuole
O nucleus, mitochondria
O cell wall, cytoplasm
O cell wall, mitochondrion

PLEASE HELP

Answers

Explanation:

nucleus and mitochondria

cell walls are only in plant cells

large vacuole is only in plant cells

(animal cells do have a vacuole but just not a large one)

Answer: Nucleus and Mitochondria

Explanation: A Is wrong because both animal and plant cells have a plasma membrane, but only plant cells have a large vacuole.
C and D is wrong because plant cells only have a cell wall not animal cells.

So B- Nucleus and Mitochondria is your answer!


Hope that makes sense! Have a good day!

30 points define in your own words biology

Answers

Answer:

Explanation:

Capillary action: movement of water or any liquid through its system by compression, (gravity, towards or away) through the system.

Polar molecule:  when a molecule has two opposite charges(positive and negative

Ionic bond :when a  chemical compound has electrostatic attraction due to the charged particles within

Covalent bond: when an electron pair is shared between the two atoms

Hydrogen bond considered a weak bond between  two molecules, a proton in one molecule and an electro negative atom Adhesion

Cohesion: attraction of molecules of similar kind towards each other.

Adhesion: attraction of molecules of different kind towards each other.

Over hunting of a species by humans can cause evolution to occur due to


natural selection


mutation


founder effect


Immigration


bottle neck effect

Answers

Over hunting of a species by humans can cause evolution to occur due to option E: bottle neck effect.

What is the bottleneck effect in regards to biology?

The bottleneck effect is known to be a term that describes how a population's size is first decreased as well as then increased and how this changes how genetic variation is distributed among its members.

Note that When a population is drastically reduced in number, genetic drift is said to  manifests itself most dramatically in a phenomenon known as the bottleneck effect.

Hence, Natural disasters (earthquakes, floods, as well as fires) can completely devastate a population, killing the majority of species and leaving only a few, haphazard survivors in their wake.

Learn more about bottle neck effect from

https://brainly.com/question/1511081
#SPJ1

What is one thing this is predicted to happen in the future (over the next 100 million years) based on the movement of the plates?

Answers

The solid crust of the Earth that we walk on is made up of fragments that make up its outermost layer. The tectonic plates, move across the globe at a rate of a few centimeters per year.

How would you define crust?

The term "crust" refers to a planet's outermost ring. Oceanic crust is younger and denser than continental crust, which is older and thicker. Plate tectonics provides insight into the dynamic geology of the crust of the Earth.

The Earth's crust is where?

The thin outer layer of rock that makes up the Earth's crust accounts for less than 1% of the planet's radius and volume. It is the top half of the lithosphere, which is made up of the crust as well as the upper portion of the mantle and is a division of the layers of the Earth.

To know more about crust visit:

https://brainly.com/question/1342862

#SPJ13

An organism's ability to maintain a constant body temperature is due to:
A. The hydrogen bond between water molecules.
B. The hydrogen bond between water molecules and the amount of heat that must be
absorbed to change its temperature by one degree Celsius.
C. Water has a high heat of vaporization which explains this ability to maintain a
constant body temperature.

(need help asap. thank u so much)

Answers

Answer:

B

Explanation:

water has high specific heat value

Even if the density seems to be altering the effect of temperature, the degree of hydrogen bonding decreases as the temperature rises. Thus, option B is correct.

What role of hydrogen bond to maintain body temperature?

The movement of molecules, or their kinetic energy, is measured by temperature. The temperature rises as the motion and energy levels rise.

The body's water plays a crucial role as a thermoregulator, controlling body temperature by assisting in heat dissipation.

When the body becomes too hot, water is lost through sweat, and heat is removed from the body when this sweat evaporates off the skin's surface.

Therefore,  The hydrogen bond between water molecules and the amount of heat that must be absorbed to change its temperature by one degree Celsius.

Learn more about body temperature here:

https://brainly.com/question/14316274

#SPJ2

What’s the correct answer answer asap

Answers

Answer:

B

Explanation:

skeletal muscles could get weary or sore if subjected under too much movements.

12. The pairing of purines with pyrimidines to create a double-stranded DNA molecule is called What?

Answers

Base pairing is the process of combining purines and pyrimidines to form a double-stranded DNA molecule.

Meaning of base pairing:

Pay attention to how it sounds. (Payers Bays) On the two opposing strands of both the DNA double helix are molecules called nucleotides that interact chemically. These chemical connections, which act as rungs on a ladder, hold the two DNA strands together.

What types of bases pair with pyrimidines?

The two main pyrimidine bases found in DNA are cytosine and thymine, which base pair (see Watson-Crick Pairing) with guanine as well as adenine (see Purine Bases) correspondingly. Thymine is swapped out for uracil and base pairs are switched to adenine in RNA.

Why do bases pair?

Between the nucleon-bases of the respective nucleotides, hydrogen bonds are created to establish base pairing. Bi and Bj must be in the interaction range for hydrogen bonding to form.

To know more about Base-pairing visit:

https://brainly.com/question/17254975

#SPJ10

Can someone help fill this table out

Answers

The first line non specific defence = skin, mucus, saliva, Normal flora, mucosal membrane, cilia, sebum, sweat, fever.

The second line non-specific defence= eosinophils, complement, macrophages, interferon(IFN), IL-1, phagocytosis, neutrophils and basophils.

The third line non-specific defence = B-cells, Th1 CD4+ T cells, IgA, IgE, IgG, Th2 CD4+ T cells, CD8+ cytotoxic T cells and IgM.

What is immune line of defence?

The immune line of defence is defined as the three basic means that is being used by the body to fight and prevent the entry of foreign organisms into the human body.

The first line of non specific defence with their various functions include the following:

Skin: protects underlying internal organs of the body.

Mucus: provides lubrication

Saliva: contains lysozyme that kills microorganisms in food.

Normal flora: fights against invading microorganisms.

Mucosal membrane: lubricates and protects underlying organs.

Cilia: helps to remove unwanted substances from the body to the exterior.

The second line non-specific defence:

Eosinophils: white blood cell the fights infection.

Complement: they opsonize pathogens and induce a series of inflammatory responses

macrophages: This is a phagocyte.

interferon(IFN): flights against opsonized microorganisms.

IL-1: flights against opsonized microorganisms.

phagocytosis: removal of microorganisms through engulfing.

Neutrophils: white blood cell the fights infection.

Basophils: white blood cell the fights infection.

The third line non-specific defence:

These are made up of cells that has been produced towards the elimination of a particular specific antigen of a microorganism. They include the following:B-cells, Th1 CD4+ T cells, IgA, IgE, IgG, Th2 CD4+ T cells, CD8+ cytotoxic T cells and IgM.

Learn more about immune system here:

https://brainly.com/question/15595309

#SPJ1

Which organism breaks down dead and dying waste in an ecosystem?

A. herbivore
B. detritivore
C. omnivore​

Answers

Detritivore these organism feed on waste in an ecosystem which eventually breaks it down

The Nutrition Facts panel must provide the ____________________ for important nutrients.
a. percent daily value
b. tolerable upper limit
c. structure–function claims
d. nutrient claim
e. average daily intake

Answers

Answer:

Explanation:

The Nutrition Facts panel must provide the percent daily value for important nutrients.

The Nutrition Facts panel must provide the percent daily value for important nutrients, hence option A is correct.

Total fat, trans fat, saturated fat, cholesterol, salt, total carbohydrate, dietary fiber, total sugars, added sugars, protein, and sure vitamins and minerals must all be listed on the Nutrition Facts label.

The facts' panel gives all the necessary details about a product, including serving sizes, servings per container, and the names and amounts of the nutritional components.

The %DV on the nutrition label indicates how much a nutrient in a serving of food contributes to the daily total.

Learn more about Nutrition Facts panel, here:

https://brainly.com/question/13346493

#SPJ2

all of the following are benefits of establishing a territory except

Answers

All of the following are benefits of establishing a territory except the "owner of the territory has exclusive rights to the food found there and is denoted as option A.

What is a Territory?

This is referred to as an area of land, sea etc or a geographical area as a whole which is controlled by someone or may be connected to a country, persons, or animal.

A territory comprises of different types of different types of organisms and it reduces competition fro resources such as nests as a result of lesser organisms being present in the area due to territorial demarcation and differences.

The owner of the territory does not have exclusive rights to the food found there and has to work for it or follow due processes in getting it which is the reason why option A was chosen.

Read more about Territory here https://brainly.com/question/382599

#SPJ1

The options are:

The "owner of the territory has exclusive rights to the food found there.Territory provides better protection from environmental factors such as extreme temperature or drought.Competition for nesting sites is reduced.There is some degree of safety afforded to the young raised there

what abiotic and biotic factors describe a biome

Answers

Biome is described as a large community of flora and fauna occupying major habitat . That consists of abiotic and biotic factors.

Biotic factors are living things within an ecosystem mainly plants animal and microorganisms . A biotic factor comprises of living organism that shapes its environment. In a freshwater ecosystem, examples might include aquatic plants, fish, amphibians, and algae. While Abiotic factors are non living components that mainly consists of water soil and atmosphere .Abiotic factors that help characterize a biome include climate, temperature, humidity, soil type and amount of sunlight and the quantity of water that is available in the ecosystem .

To learn more about Biome , here

brainly.com/question/11491362

#SPJ1

What is a difference between endocrine and exocrine glands?
• A. Endocrine glands secrete products into ducts and exocrine glands secrete hormones into the bloodstream.
O B.
Endocrine glands secrete hormones into the bloodstream and exocrine glands secrete products into ducts,
• C. Endocrine glands produce nutrients for cells and exocrine glands absorb minerals for cells.
O D. Endocrine glands absorb minerals for cells and exocrine glands produce nutrients for cells.

Answers

Answer:

B.

Explanation:

Endocrine glands release hormones into the bloodstream, while exocrine glands release substances through ducts onto your body surfaces, making B the correct answer.

Locate and Label the plasma membrane, cell wall, and middle lamella.

Answers

The given diagram is labelled with the plasma membrane, cell wall, and middle lamella.

Plasma Membrane- All cells have a cell membrane, also known as a plasma membrane, which divides the inside of the cell from of the external environment. A semipermeable lipid bilayer makes up the cell membrane. The movement of materials into and out of the cell is controlled by the cell membrane.

Cell Wall- Every plant cell is encased in a particular type of extracellular matrix. Many of the traits that set plant cells apart from animal cells are caused by the cell wall.

Middle Lamella- The portion of the cell wall that makes up the middle lamella is indeed the top layer separating cells. It contains a lot of pectin, which binds the main cell walls of nearby cells. It creates stability and plasmodesmata (connections between cells).

To know more about the Plant Cell, click on the below link,

https://brainly.com/question/2289665

#SPJ1

The symbiotic relationship
between a flower and a bee is...
A. parasitic.
B. mutualism.
C. commesalism.

Answers

Mutualism because they both help one another
B. is the answer to your question

four effects of muscle contraction.

Answers

Answer:Isometric: A muscular contraction in which the length of the muscle does not change. isotonic: A muscular contraction in which the length of the muscle changes. eccentric: An isotonic contraction where the muscle lengthens. concentric: An isotonic contraction where the muscle shortens

Explanation:

do you think that the incubation period of all the animal is same? why?​

Answers

Answer:

no

Explanation:

incubation varies for different species.

Think of a place on Earth where you would like to live or visit some day. Write down a description of the climate there and the various factors you think might influence that climate. Think about the reasons why you chose those particular factors as important contributors to the climate.

Answers

The presence of methane or carbon dioxide in the air is associated with climate because they function as greenhouse gases that trap heat from solar radiation into the atmosphere.

What are greenhouse gases?

Greenhouse gases such as carbon dioxide or methane are able to alter the global climate because they do not allow the dispersion of heat from solar radiation into space, thereby increasing global temperatures.

Therefore, we can conclude that greenhouse gases (e.g., carbon dioxide or methane) may alter the global temperature and therefore the concentration levels of these substances in the atmosphere are indicative of climate conditions.

Learn more about greenhouse gases here:

https://brainly.com/question/20349818

#SPJ1

.Why deontology still important in contemporary healthcare practice?

Answers

Deontological values, such as treating patients as ends in themselves, can help to eliminate potential maleficence while increasing beneficence, justice, and autonomy.

What is deontology?

Deontology is an approach to ethics that uses regulations to distinguish between what is right and what is wrong.

Immanuel Kant is frequently associated with deontology. Kant held that ethical actions must adhere to universal moral laws.

Deontologists place a premium on three major decision-making principles: intrinsic morality, the duty of care, and the moral consequences of an action.

In deontological ethics, an action is morally good because of some aspect of the action itself, rather than because the result of the action is good.

According to deontological ethics, some acts are morally obligatory regardless of their consequences for human welfare.

Thus, deontology still important in contemporary healthcare practice.

For more details regarding deontology, visit:

https://brainly.com/question/28895459

#SPJ1


Which of the following would be a characteristic of a cell
produced by mitosis?

Answers

Daughter cells that are genetically identical to their parent cells are created during mitosis. The cell equally divides its copies of its chromosomes to give each daughter cell a full set before copying, or "replicating," them.

What traits do cells created during mitosis possess?

Daughter cells that are genetically identical to their parent cells are created during mitosis. The cell equally divides its copies of its chromosomes to give each daughter cell a full set before copying, or "replicating," them.

What types of cells are capable of undergoing mitosis to produce them?

A cell divides into two identical copies during the process of mitosis, each of which has the same number of chromosomes. Four gametes are produced during the meiotic division of a cell. Male gametes are more frequently referred to as sperm, and female gametes as eggs.

To know more about Mitosis visit:

https://brainly.com/question/26678449

#SPJ9

Need assistance on these question, any help is appreciated!

1. The human papillomavirus (HPV) causes many cases of cervical cancer and oropharyngeal cancer. There is a vaccine that protects against the strain that causes cervical cancer, but it is not certain that same vaccine protects against oropharyngeal cancers. What experiments could medical professionals perform to best determine the effectiveness against oropharyngeal cancers?


A) Randomly assign a number of young adults to either a group to be vaccinated or a non-vaccinated group and record the incidence of cervical or oropharyngeal cancers in each.

B) Compare the incidence of cervical and oropharyngeal cancers in people who have been vaccinated and those who chose not to be vaccinated.

C) Vaccinate many people and compare the incidence of cervical cancers to the incidence of oropharyngeal cancers.

D) Compare the incidence of cervical cancers and oropharyngeal cancers in the general population.


4. The calcium that triggers muscle contraction is stored in the


A) motor neuron.

B) plasma membrane of cells.

C) endoplasmic reticulum.

D) mitochondria.


Any help is appreciated, thanks!

Answers

1.) The experiment that the medical professionals would perform to best determine the effectiveness against oropharyngeal cancers is to compare the incidence of cervical and oropharyngeal cancers in people who have been vaccinated and those who chose not to be vaccinated. That is option B

4.) The calcium that triggers muscle contraction is stored in the endoplasmic reticulum. That is option C.

What is human papillomavirus (HPV)?

The human papillomavirus (HPV) us a type of virus that belongs to the family non-enveloped DNA viruses that are being transmitted during intercourse.

The human papilloma virus is known to be the main cause of cervical cancer and oropharyngeal cancer which can be prevented through the use of vaccines.

To check the effectiveness of these vaccines, two variables are used:

Dependent variables: This is the set of individuals that has received vaccination against the human papillomavirus (HPV).

Independent variables: This si the set of individuals that has chosen not to receive a vaccine against the human papillomavirus (HPV).

Therefore the effectiveness of the vaccine is being observed when the incidence of cervical and oropharyngeal cancers in people who have been vaccinated and those who chose not to be vaccinated are compared.

The calcium that triggers muscle contraction is stored in the specialized smooth endoplasmic reticulum called the sarcoplasmic reticulum.

Learn more about cancer here:

https://brainly.com/question/28114108

#SPJ1

The enzymatic process illustrated here shows which kind of reaction?

Answers

This image illustrates an Anabolic process.

What is Anabolism?The group of metabolic mechanisms known as anabolism create molecules out of smaller building blocks. These processes, commonly referred to as endergonic reactions, demand energy. In contrast to catabolism, which is the breakdown process, anabolism is the process of constructing. Usually, anabolism and biosynthesis are used interchangeably.Catabolism, in which big molecules are disassembled into smaller components and subsequently consumed in cellular respiration, fuels anabolism. Adenosine triphosphate is broken down to power a variety of anabolic activities (ATP).Organs and tissues are built through anabolic processes. These processes result in the development, differentiation, and expansion of cells as well as a rise in body size. The development and mineralization of bone and increases in muscle mass are two examples of anabolic processes.

To learn more about Anabolism, refer to:
https://brainly.com/question/16793262

#SPJ13

Other Questions
find both the number combinations in the number of permutations for 9 objects taken 7 at a time Your answer isDante will run at least 33 miles this week. So far, he has run 15 miles. What are the possible numbers of additional miles he will run?Use t for the number of additional miles he will run.Write your answer as an inequality solved for t. Is it mandatory for US citizens 18 years old and older to register membership in a political party? 2(64x - 25) (x + 49) = 0 What would the code for this be?The language used is Python. Please help. Match each issue with the best solution 1 An administrator needs to gather informationon patient referrals to determine the sourceof each referral and which types of agenciesrefer the greatest number of patients.2 A primary care provider notices an increasein fracture injuries among patients in the10-to 13-year-old age range and wondersif there might be a connection among theinjury type, the age range, and patients'leisure activities.3 A nurse values patient-centered care andwants to encourage her patients to takean active role in developing their treatment plans.A. Shared decision makingB. Analytical thinking C. Abstract thinking Silver has been regarded as something precious for thousands of years. By 700 BCE, it was used to make coins. The production of silver grew over the centuries, but when Europeans first went to America, silver began to be used in many new and different ways. By the 19th century, nearly 120 million troy ounces were being produced annually. Now, more than 5000 years after ancient cultures first began to mine this precious metal, an average of 671 million troy ounces is mined every year. In earlier times, silver was thought to have magical properties and it was considered to be useful in keeping bad spirits away. Nowadays, most people think of silver in relation to ornaments. But it is significant for its antibacterial properties too. The ancient Phoenicians kept water, wine and vinegar in silver vessels to ensure freshness. It is only recently, however, that scientists have discovered how silver works. Quite simply, silver destroys the ability of bacteria to form the chemical bonds which are essential to their survival. When bacteria and silver come into contact, the bacterial cells fall apart. Today, there are bandages and ointments that use silver as an active ingredient. Silver promotes the growth of new cells, which in turn increases the rate of healing. This makes silver especially valuable for treating burns and wounds. Another key use for silver is in the millions of water purifiers that are sold each year. Silver prevents bacteria from building up in filters so that they can work effectively. Research has shown that silver, together with oxygen, cleans water. This means that other chemicals, such as chlorine, do not have to be used. Silver is therefore starting to be added to water purification systems in hospitals, community water systems and swimming pools. Scientists hope that silver will be able to be used in helping to produce clean drinking water in countries where water-borne illness is a problem. Current research shows that this use of silver is an exciting development for the global water supply. In the past, silver was often used to decorate places of worship, and many people saw it when they went to pray. Today, there is probably much more silver around us, but we do not necessarily see it. For example, every time you travel in a motor vehicle you are surrounded by pieces of silver. Every electrical action in a modern car is activated with silver-coated contacts. Basic functions such as starting the engine and opening power windows .all need a special switch that has a silver covering. Another important feature for our driving safety is the silver-ceramic lines fitted into the rear window. The heat created by these lines clears the rear window of mist and ice so that we can see clearly out of it. Silver is just as valuable today as it has been throughout human history. On the basis of your understanding of the passage, answer the following questions by choosing the most appropriate option. i. When did silver started to be used for more things than plates and coins? (a) When Europeans first went to America (b) When Turkey produced (c) Both (a) and (b)(d) Neither (a) nor (b) ii. How long ago was silver first mined? (a) 5000 years ago(b) More than 5000 years ago (c) By 700 BCE(d) By the 19th century iii. According to the chart, which is the highest silver-producing country, and how much silver does it produces per year? (a) Country: Kazakhstan; Amount: 17 million troy ounces (b) Country: Iran; Amount: 17 million troy ounces (c) Country: India; Amount: 3 million troy ounces (d) Country: Kazakhstan; Amount: 3 million troy ounces iv. What do most people today associate silver with? (a) ornaments(b) coated utensils (c) coins(d) filteration v. How does silver destroy bacteria? (a) Destroys bacterias ability to form chemical bonds(b) Makes cells fall apart (c) Both (a) and (b) (d) Neither (a) nor (b) vi. Why is silver useful in treating skin injuries? (a) promotes growth of new cell(b) prevents cells from healing (c) falls the bacterial cells (d) used in bandages vii. What health problem might silver prevent in some countries? (a) burn problems (b) air borne viruses (c) water borne illness(d) health problems viii. Why is silver used in the rear window of a car? (a) for driving safety (b) it clears mist and ice (c) it enables to see clearly(d) All of these ix. According to the chart, which is the lowest silver producing country?(a) Kazakhstan(b) Iran (c) Indonesia(d) Turkey Simplifying a Rational Expression Simplify (a ^ 2 * b ^ 8)/(a ^ 2 * b ^ 3 - a ^ 4 * b ^ 2); (a * b ^ 2)/(1 - a ^ 4 * b ^ 2); (a ^ 3 * b ^ 8)/(a ^ 2 * b ^ 2 * (b - a ^ 2)); b/(1 - a); (a * b ^ 4)/(b - a ^ 2) Mariam wants to buy strawberries and apples tomake a fruit tart. Strawberries cost $3 per poundand apples cost $3.25 per pound. How many poundsof fruit does she buy if she buys 0.5 pounds ofstrawberries and 3 pounds of apples? How manypounds of fruit does she buy if she buys x pounds ofstrawberries and y pounds of apples? Right triangle DEF is shown below.What is DF to the nearest tenth of a meter? Do Now:1. What is the author's main purpose in writing this humorous narrative?OA to convince people to tell jokesOB to describe a life-changing moment in his lifeCC to describe what it's like to go to Catholic schoolOD to explain why he didn't get a good grade in religion class2. Select the sentence that supports the answer in Part A.OA "That day I reached a life-choice fork in the road." (paragraph 7)B "The whole class turns to look at me and the train wreck about to happen." (paragraph14)C "I can only feel the punch line building." (paragraph 19)OD "I don't remember the grade I got in fifth-grade religion class." (paragraph 25)3. What can the reader infer about Mr. Scieszka's ability to tell jokes as a child?OA He was shy, and jokes helped him gain confidence.OB He enjoyed telling jokes, but he often messed up the punch lineOC Even as a child, he already knew how to get an audience laughing.OD Even as a child, he knew how to make humorous connections with adults, likeSister Margaret Mary. Using search operators in conjunction with strong keywords is a smart search strategy. Imagine you are looking for primary sources to answer the question, How did the United States involvement in World War I affect American daily life? How would you go about formatting a search query? Check all that apply.A. Using natural language in the search fieldB. Searching for results with United States OR American in the title fieldC. Using the Boolean operator NOT to limit your articles related to WWID. Constricting your search results by publication yearsin responder . how much space is saved by representing the hawaiian word aloha in the variable length code as compared to the fixed length representation? what is the compression ratio? you are running an old pc with windows xp installed. you have gotten a new computer with windows 10 but you want to be able to still run some of the applications installed on your old pc using virtualization. what can you do? a. install a second monitor on your new pc b. create a virtual disk and restore the xp machine from backup c. use physical-to-virtual conversion d. move the old hard disk to your new pc using the model of demand and supply for u.s. dollars, what would you expect to happen to the u.s. dollar exchange rate if, in light of a worsening geopolitical situation, americans viewed foreign bonds as riskier than before? production at south side assemblers last quarter was 178,500 units. if the company expects to produce 9.5% less units this quarter, how many units do they expect to produce this quarter? 4. What do the words "offensive" and "obscene" mean? How are they alike, and how are they different?How do these terms relate to censorship of books? Please help with finding the approximate mean pretty easy 7th grade math. One cause for the rapid population growth since the Industrial Revolution is Choose... better medical care.infant mortality.food shortages.poor sanitation Hi any one can tell me what we post to be doing this assignment? I can show more details.