Answer:
It will take 63 years
In 189 years, one-eight of the sample will be left
By multiplying the number of half-life cycles
Explanation:
I just completed this assignment.
A scientist is studying a radioactive element that has a half-life of 63 years. It will take 63 years, In 189 years, one-eight of the sample will be left.
what is the meaning of half life ?A radioactive element is defined as the material when it changes its atomic number or weight by emitting energy, the energy may be either Alpha, beta, or gamma forms of radiation.
Alpha is a Helium nucleus, a beta particle is an electron and a gamma is high energy electromagnetic radiation. Half-Life can be defined as the time required by which the radioactive substance to split into a different substance.
The half life was first discovered by Ernest Rutherford and represented by the Ug or t1/2, If the radioactive element has one-hour of half-life, it means one half of the element would decay within an hour and the remaining part would decay in another hour.
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Fill in the blank:
Word Bank:
Cyclins, Inactivation, Skin, Cancer, Chromatids, Nerve
In multicellular organisms, cell growth and division is very controlled. Some cells like muscle and _______ cells stop dividing after maturity. Other cells like ______ and blood cells grow and divide rapidly through life. _______ are proteins that regulate the timing of the cell cycle, "telling" the cell when to divide. If cells stop responding to regulation, uncontrolled cell growth can lead to ______.
The growth and development of an organism are dependent on the control and coordinated activities of the cells, tissues, and organs.
The correct blanks for the given paragraph are:
In multicellular organisms, cell growth and division are very controlled. Some cells like muscle and nerve cells stop dividing after maturity. Other cells like Skin and blood cells grow and divide rapidly through life. Cyclins are proteins that regulate the timing of the cell cycle, "telling" the cell when to divide. If cells stop responding to regulation, uncontrolled cell growth can lead to cancer.
The statements can be explained as:
The muscle and nerve cells stop dividing after maturity. The nerve cells lack centrioles, which play a crucial role in the division of cells. Thus, the nerve and muscle cells do not divide. The skin and blood cells divide continuously and throughout life. The cells when are damaged or dead, these cells replace them. Cyclins are the proteins, which regulate and activate the cell cycle by binding with the cyclin-dependent kinases.Cancer is repetitive and uncontrolled cell growth. It can be caused due to failure of regulation of cell cycle or any carcinogen exposure.
Therefore, the correct answers are nerve, skin, cyclin, and cancer.
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why are plublishing results imporant to science
Answer:
Explanation:
Because, everyone will know what the scientist are working on and see for example in sickness cases if they are working on a vaccine and if they make an progress... At least that's what I think.
Hope this helps!
What is a photosytem
Answer:
Below
Explanation:
The light reaction of photosynthesis. ... High-energy electrons, which are released as photosystem I absorbs light energy, are used to drive the synthesis of nicotine adenine dinucleotide phosphate (NADPH). Photosystem I obtains replacement electrons from the electron transport chain.
What carries digested food to the cells of an animal?
A. plasma
B. enzymes
C. red blood cells
D. white blood cells
Answer:
B. Enzymes
Explanation:
Animals feed by secreting enzymes through the cell membrane onto the food. The enzymes break the food into molecules small enough to be taken pass through the cell membrane into the cell.
which cell stucture is responsible for the passage of material into and out the cell
The tRNA lines the amino acids up to form...
1.a Congo line
2.a protein
3.a compact molecule
4.an alloy
Which of the following is not a technological way of improving air quality?
a.
using electrostatic precipitators
b.
installing solar panels
c.
composting
d.
building wind turbines
Answer:
c.
composting
Explanation:
Composting is not a technological way of improving air quality (Option C).
What is air quality?Air quality refers to the absence of pollutant substances (e.g. monoxide carbon) in the air.
Air quality is fundamental for maintaining overall health and increasing the quality of life.Air quality can be measured by using different devices or indicators (for example, by measuring the amount of carbon monoxide and nitrogen oxides).In conclusion, composting is not a technological way of improving air quality (Option C).
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Which of the following is NOT related to lipids (does not belong)?
A)fatty acids
B)energy storage
C)sugars
D)fats, oils, waxes
option c is the answer of your question
Which statement is the best example of an object and motion that would make it hard for people to accept Newton’s first law?
A. A rolling ball eventually slows down and comes to a stop.
B. A box does not move when pushed equally from opposite sides.
C. The heavier the load in a cart, the harder the cart is to turn.
D. A wago
Answer:
a
Explanation:
object in motion will stay in motion until it is acted upon
Answer:
A
Explanation:
7 A student who was training for a cross country race jogged for 2.0 hours and covered a
distance of 14.0 kilometers. What was the average speed of the student?
A
28.0 km/hr
B
7.0 km/hr
С
12.0 km/hr
D
0.14 km/hr
Answer:
7.0 km/hr
Explanation:
A student who was training for a cross country race jogged for 2.0 hours and covered a distance of 14.0 kilometers. The average speed is 7.0 km/hr. Hence option B is correct.
What is training?Training is defined as the process of educating or training your staff on a certain task in order to increase their performance or expertise. There are three main goals of training from the perspective of the individual employee: Increase the person's awareness level. Boost a person's proficiency in one or more of their areas of specialization. increase the drive for someone to do their work successfully.
Average speed is defined as the entire distance that an object has gone in a given amount of time.
It can be expressed as
Speed = Distance / time
Speed = 14.0 km / 2.0 h
Speed = 7.0 km / hr.
Thus, a student who was training for a cross country race jogged for 2.0 hours and covered a distance of 14.0 kilometers. The average speed is 7.0 km/hr. Hence option B is correct.
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answers plz???????!!!!!!!!
Answer:
first blank is two, second blank is four
Explanation:
Mitosis results in two genetically identical cells.
Meiosis results in four sex cells.
olha nao dissseste a perguntaaa
What is the purpose of DNA? *
A. manufactures proteins
B. reduces activation energy
C. stores hereditary information
D. to aid in facilitated diffusion
Answer:
c is your right answer
Explanation:
The function of DNA is to store all of the genetic information that an organism needs to develop, function, and reproduce. Essentially, it is the biological instruction manual found in each of your cells.
4. Which is an example of a fungus?
O blue-green algae
slime mold
O bread mold
O brown algae
Answer:
Bread mold is an example of a fungus.
hope it helps!
Which of the following is NOT an example of a plant adaptation towards success in their habitat.
Question 1 options:
A.Colored flowers attract pollinators to scatter their seeds.
B.Plants grow thorns to repel grazers to prevent damage.
C.Plants grow towards light as they compete fro resources.
D.Plants take in water for photosynthesis.
D.Plants take in water for photosynthesis.
the rest are influenced by their habitat
Question 4
1 points)
A scientist warms a chemical to 385 K, and the chemical begins to boil. How much higher is this boiling point of the chemical
than the boiling point of water?
12K is the boiling point of the chemical .
The boiling point of any liquid changes to the applied pressure the normal boiling point is the temperature at which the vapor pressure is equal to the standard sea-level atmospheric pressure .At sea level, water boils at 100° C (212° F).The boiling point of a liquid is the temperature at which its vapor pressure is equivalent to the pressure of the gas above it.
Boiling point is used to identify and classify a given compound. A liquid boils when its vapour pressure is equal to the atmospheric pressure. Vapour pressure is also defined by the kinetic energy of a molecule. Kinetic energy is dependent on the temperature, mass and velocity of a molecule.
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pick two structures from an animal cell and explain how they work together and how their functions are vital in keeping the cell alive. the options are cytoplasm, smooth er, nucleolus, nucleus, mitochondria, lysosome, and cell membrane.
Answer:
the cell membrane is the semi-permeable protective cover that keeps the cell held together. the cytoplasm is semi-fluid within the cell membrane that keeps the cell in shape.
Explanation:
What is an advantage to SMRs?
Select all that apply.
less atmospheric emissions
use fusion instead of fission
reduced cost
reduced construction time
Answer:
PLEASE MARK ME THE BRANIEST THANK YOU :)
Explanation:
The next decades are crucially important to putting the world on a path of reduced greenhouse gas emissions.
By the end of the century, demand for energy will have tripled under the combined pressure of population growth, increased urbanization and expanding access to electricity in developing countries. The fossil fuels that shaped 19th and 20th century civilization can only be relied on at the cost of greenhouse gases and pollution.
A new large-scale, sustainable and carbon-free form of energy is urgently needed. The following advantages make fusion worth pursuing.
Abundant energy: Fusing atoms together in a controlled way releases nearly four million times more energy than a chemical reaction such as the burning of coal, oil or gas and four times as much as nuclear fission reactions (at equal mass). Fusion has the potential to provide the kind of baseload energy needed to provide electricity to our cities and our industries.
Sustainability: Fusion fuels are widely available and nearly inexhaustible. Deuterium can be distilled from all forms of water, while tritium will be produced during the fusion reaction as fusion neutrons interact with lithium. (Terrestrial reserves of lithium would permit the operation of fusion power plants for more than 1,000 years, while sea-based reserves of lithium would fulfil needs for millions of years.)
No CO₂: Fusion doesn't emit harmful toxins like carbon dioxide or other greenhouse gases into the atmosphere. Its major by-product is helium: an inert, non-toxic gas.
No long-lived radioactive waste: Nuclear fusion reactors produce no high activity, long-lived nuclear waste. The activation of components in a fusion reactor is low enough for the materials to be recycled or reused within 100 years.
Limited risk of proliferation: Fusion doesn't employ fissile materials like uranium and plutonium. (Radioactive tritium is neither a fissile nor a fissionable material.) There are no enriched materials in a fusion reactor like ITER that could be exploited to make nuclear weapons.
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question
A student poured a solution of bromothymol blue indicator into three test tubes. Then he placed an aquatic plant in two of the test tubes, as shown below. He placed a stopper on each test tube and placed them all in the dark for 24 hours. Bromothymol blue turns from blue to yellow in the presence of CO2
Predict what will happen to the test tubes in Figure 9–9 after 24 hours in the dark.
In the dark the aquatic plant won't do photosynthesis. Instead it will do cellular respiration in which it will produce CO2. Therefore after 24 hours of letting the plant in the dark introducing Bromothymol in the solution will cause it to turn yellow.
The first hoops were actually peach baskets and the first backboards were made of plywood. The given statement is true.
Why mental health and emotional health is an important role in ones life?So you'll be getting out of the house and hanging out with them rather than being alone with no one to talk or turn to. Which now leads us to mental health our emotions will be average rather than feeling utterly alone and if you ever feel that way your good friend will help you and talk you through it.
The health triangle consists of Physical, Social, Mental Health. Physical health deals with overall working for organs and skeleton structure together. It includes food intake, sleep and exercise and Mental health deals with how peaceful and positive mind human being have. It includes stress management and mental diseases. Social health deals with how we interact with people and how often we interact. It includes family and friends relationships.
Therefore, The first hoops were actually peach baskets and the first backboards were made of plywood. The given statement is true.
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PLEASE HELP ME WITH THIS!
Considering ethical questions is part of a marine scientist’s job. Part of being ethical is doing your homework and exploring all sides of an issue. Choose a current ethical issue in marine science, such as the use of genetically modified organisms (GMOs), conditions in fish farms, or another topic your instructor approves. Find two perspectives supporting one side of the ethical issue and two supporting the other. Be sure to use reliable sources, such as university web sites or newspaper/magazine articles. Create an outline with at least five points for each side. Then write a brief paragraph explaining what you believe an ethical choice around this issue is. Remember, ethical problems are difficult because both sides have valid points. Be sure to consider and discuss at least one point you think is valid from the side that you disagree with in your conclusion as you explain why your choice is the ethical one. Also, include a list of sources that you used. Two is the minimum for each point of view.
lo siento cariño, esto está fuera de mi alcance, los biloogistas marinos son geniales y me encanta ayudar, pero no puedo, lo siento mucho. como si realmente estuviera jodiendo como si apesta jaja quiero ayudarte pero no puedo
One current ethical issue in marine science is the use of genetically modified organisms (GMOs) in aquaculture.
What are genetically modified organisms?Genetically modified organisms (GMOs) are living organisms whose genetic material has been artificially altered in a laboratory using genetic engineering techniques.Here are two perspectives supporting each side of the issue:
Perspective 1: According to a report by the World Health Organization (WHO), GMOs have the potential to reduce the environmental impact of aquaculture by decreasing the need for wild fish as feed, reducing the use of antibiotics, and decreasing the risk of disease outbreaks.
Perspective 2: Opponents of GMOs in aquaculture argue that they pose a significant risk to wild fish populations and the environment. According to the Ocean Conservancy, GMO fish can escape from fish farms and breed with wild fish, potentially altering the genetic makeup of natural populations and harming biodiversity.
Therefore, use of GMO's is profitable as well as hazardous for the environment.
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If there is 37% of cytosine in a molecule of double-stranded DNA, what percentage of guanine is present?
A.) 63%
B.) 40%
C.) 37%
D.) 60%
Answer: B
Explanation:
If you REALLY think about it , you will see that it is 40%
The list describes examples of several ways organisms obtain energy.
Organism A eats other living things for food.
Organism B gets food from parts of decomposing matter.
Organism C makes its own food.
Organism D absorbs food from what it lives in or on.
Select the organism that would be classified as a member of the plant kingdom.
A
Organism D
В.
Organism B
Organism A
D.
Organism C
Organism C makes its own food is examples of several ways organisms obtain energy.
What is Energy?Energy is referred to by scientists as the capacity for work. People have figured out how to transform energy from one form to another and then use it to accomplish tasks, making modern civilization possible.
Walking and bicycling, driving cars on roads and boats through water, cooking meals on stoves, making ice in freezers, lighting our homes and workplaces, producing goods, and sending astronauts into space all require the usage of energy.
Energy is capable of changing its forms. For instance, a person's body stores chemical energy from the food they consume until they may use it as kinetic energy when working or playing.
Therefore, Organism C makes its own food is examples of several ways organisms obtain energy.
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What is the niche of the shark whales?
Answer:
The whale sharks niche in the environment is essentially population control. The whale shark spends all day eating and without it the populations of krill and plankton would increase by a large amount.
Explanation:
Whale sharks have a broad distribution in tropical and warm temperate seas, usually between latitudes 30°N and 35°S. They are known to inhabit both deep and shallow coastal waters and the lagoons of coral atolls and reefs. Australia is one of the most reliable locations to find whale sharks. It is very difficult to conduct research on the shark's role in the ecosystem so scientists aren't sure what would happen if sharks became extinct. ... If the whale shark becomes extinct, there might be an increase in plankton. However, plankton are also eaten by several species of whale. Whale sharks are one of the most amazing animals in the world — and while they may be sharks, they're also one of the most gentle fish in the sea. In fact, whale sharks are so gentle, they're completely safe to swim around. Our Whale Shark Encounter tour gives you the opportunity to do just that.
That's one scary shoork-
Choose the mutation that you think has caused Calix’s calico fur coloring. Form a hypothesis to explain your reasoning. You will be able to revise your hypothesis as you collect more data.
Answer:
Nondisjunction
Explanation:
what is the complementary dna strand of C-C-T-A-G-C-T
Answer:
G-G-A-T-C-G-A
Explanation:
The A-T pairs are connected by two hydrogen bonds, while the G-C pairs are connected by three hydrogen bonds.
What is needed for the rock cycle to continue?
Answer:
The rock cycle is a concept used to explain how the three basic rock types are related and how Earth processes, over geologic time, change a rock from one type into another. Plate tectonic activity, along with weathering and erosional processes, are responsible for the continued recycling of rocks.
hello I need help!!! did I get this right
Answer:
Yeah it is correct.
Explanation:
Things enter the cell through the cell membrane through either active or passive transport which can tell you that the cell membrane controls what goes in and out.
I believe so. I looked it up and it matched everything I found
Which compounds has the same empirical formula?
C4H10 AND C2H5 have the same empirical formula
During facilitated diffusion - it is still passive but needs help of proteins to help pass.
false
true
Answer:
True
i think
Explanation:
If your house was a cell, what structure of your house would represent a cell membrane?
Answer:
the walls/insulation
Explanation:
wall or insulation i think
i got it from the internet
Is Iron organic or inorganic explain why?
Answer:
yes
Explanation:
Because inorganic minerals and organic minerals have the same chemical compositions, they were confused by the early nutritionists. The mineral, iron, in the bloodstream has the same chemical composition as the mineral, iron, in a nail—iron is iron, after all.
Answer:
it is depends
Explanation:
It depends on what you are talking about Iron organic and inorganic are two totally different things.