Which of these molecules would you least expect to easily dissolve in water?a. sucrose b. potassium chloride c. acetone d. 2-methylpropane e. acetic acid
Answer:
D. 2-methylpropane
Explanation:
The ability of a substance to dissolve in water is dependent on whether the molecules of the substance are polar or non-polar . Since water is a polar molecule, polar molecules readily dissolve in it in accordance with the principle of "like dissolves like".
Sucrose is a polar molecule since like water, it has bonds between electronegative oxygen, and electropositive hydrogen. Thus, it dissolves in water.
Potassium chloride is an ionic and hence polar molecule. It readily dissolves in water.
Acetone is a polar molecule due to the polar nature of the carbon-oxygen double bond in the molecules. Thus, it easily dissolves in water.
2-methylpropane is a non-polar molecule. The C-H bonds present in its molecules are non-polar, so it does not readily dissolve in water.
Acetic acid is a polar molecule due to carbon-hydrogen bond as well as oxygen-hydrogen bond. It readily dissolves in water and forms hydrogen bonds with water molecules.
What are two specific examples of where this division occurs in nature?
Answer:
There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells.
Explanation:
hope this helps you.
Which describes a group of organisms that are members of species
How many amino acids must be obtained in the diet because they cannot be made by the body?
O 2
O 5
O 10
O 20
Answer:
C
Explanation:
Edge 2021 did the quiz and got 100%
Bread and pasta are carbohydrates commonly consumed by people what chemical feature of carbohydrates makes them necessary food?
Answer:
It gives the body energy and calories
Which feature of model 1 best illustrates how biological information is coded in a DNA molecule?
The 5′ and 3′ labels at the ends of each strand
The 5′ and 3′ labels at the ends of each strand
A
The labeling of the hydrogen bonds between base pairs
The labeling of the hydrogen bonds between base pairs
B
The lines connecting sugars and phosphate groups that represent covalent bonds
The lines connecting sugars and phosphate groups that represent covalent bonds
C
The linear sequence of the base pairs
Answer:
The correct answer is - option C. The linear sequence of the base pairs .
Explanation:
The double helix structure is presented in the model which exhibits the two major and important characteristic of the DNA molecule. The first major property of the double helix model shows that each strand of the molecule acts as a template for the creation of the complimentary strand.
The second major property is that the genetic information can be be store in the linear sequence of the nucleotide or the base pair along with the backbone of the molecule.
Thus, the correct answer is - option C. The linear sequence of the base pairs .
Which of the following processes do not take place in the mitochondria? a) citric acid cycle b) conversion of pyruvate to activated acetyl groups c) oxidation of fatty acids to acetyl CoA d) glycogen breakdown
Answer:
D
Explanation:
The breaking down of glycogen-glycogenolysis takes place in the cytosol of cells of the liver and muscles.it is the compensatory process for providing glucose depleted cells with extra glucose. It is the opposite of Glucogengenesis the formation of glycogen in cells.
it involves the activities of enzymes glycogen phosphorylase which catalysis the removal of alpha1-4glycosidic bonds from the glycogen molecules.Thus freeing the glucose molecules from the glycogen while retaining the 1-6 glycosidic bonds.
Its stimulation is by epinephrine hormone.while the hormones glucagon from the pancreas control its release into the blood stream,Thus the low levels of glucose in the blood stream caused glucagon to initiate the breakdown of glycogen in the liver and muscles down to glucose.As the level of this rise in the blood stream Insulin stimulates the entry of the glucose into the cells reducing the levels of blood glucose,inhibiting glucagon levels ,and therefore stopping Glycogenolysis.
For the following question, which is the best hypothesis "Does exposure to radon (a source of natural radiation) in your home cause an increased risk of cancer?"
Everyone who is exposed to radon will die from cancer.
People should not risk exposure to radon!
Cancer may be caused by many different factors, including exposure to radiation, chemicals and too much stress in a person's life.
I am immune to cancer because there is no history of cancer in my family.
People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.
Answer:
People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.
Explanation:
Hypothesis of an experiment is a testable explanation or a suggested solution that aims to answer a question asked or solve an observed problem. The hypothesis must be able to be tested via experimentation and must not be true. A good hypothesis should include the independent and dependent variables in it.
For the problem/question asked in this experiment that: Does exposure to radon (a source of natural radiation) in your home cause an increased risk of cancer?"
The best hypothesis that provides a testable answer to this question is: People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.
From the above hypothesis, we can see that it contains the independent variable, which is exposure to radon, and the dependent variable, which is cancer rate
People who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.
Mutations are alterations in the DNA (nucleotide) sequence of the genome of an organism.Cancer is a multifactorial disease that is associated with mutations in DNA.Radon is a mutagenic agent that increases the risk of mutation leading to cancer.In conclusion, people who have been exposed to radon have an increased rate of cancer, as compared to people who have not been exposed.
Learn more in:
https://brainly.com/question/1104958
Drew observed in an experiment that algae in a nearby lake could be found at six meters below the water's surface on a clear day. On a cloudy day, Drew noted that the algae sat only one meter below the surface of the water. What was the dependent variable in Drew's experiment? the lake that Drew observed the depth at which Drew found the algae the amount of algae measured the sky conditions on a particular day
Answer:
The depth at which Drew found the algae
Explanation:
The dependent variable was the depth at which he found the algae, because that is what he measured on each day.
The independent variable was the sky conditions, since that changed from clear to cloudy, which impacted the dependent variable/the depth of the algae.
What happened in the 1980’s with environmental laws and regulations because some people claimed that the laws and regulations were hurting the economy?
Environment laws were stricter in the 1980s. Thus, people contested them saying that this will increase inflation.
What are environmental laws?Several environmental laws have been adopted over the last five decades in the United States. These laws have resulted in dramatic effects on the air and water quality of the nation. These have also reduced the exposure of people to toxic chemicals.
Various generations of the American public have benefitted from the legacy of leadership that has taken environmental issues as their primary priority. The benefits achieved by these laws and efforts have been controversial, to say the least.
Some of these laws have resulted in the utilization of huge amounts of public funds. Because of the misconception of a large number of the public that environmental issues are not serious or real, people believe that spending huge sums of money on environmental issues is a waste of a form of corruption.
Therefore, because the environmental laws were stricter in the 1980s, people contested them saying that this will increase inflation.
Read more about environmental laws, here
https://brainly.com/question/4432202
#SPJ2
Which disease can be transmitted by ticks?
A student wonders whether removing the nucleus from a cell would result in a new prokarytic cell. Why would this procedure fail to produce a prokaryotic cell
Answer: Yes the cell would lack genetic information
Explanation:
What was the result of the overhunting of sea otters along the Pacific Coast?
The sea otters on the Pacific Coast went extinct.
The sea urchin population expanded and consumed the kelp and damaged the habitat.
The sea urchin population was reduced to dangerous levels.
The kelp grew rapidly and created new habitat for fish.
Answer:
The sea urchin population expanded and consumed the kelp and damaged the habitat.
Explanation:
Sea otters prey on sea urchin and keep their population under control. Without sea otters, the sea urchin population cannot be kept in check and they will over consume kelp.
Devastating effects resulted from the excessive sea otter hunting around the Pacific Coast. Because sea otters are a keystone species in the ocean, they have an outsized impact on their surroundings. They eat kelp forests, which in turn eat sea urchins.
What happened without the sea otters ?Without sea otters to control their numbers, the sea urchin population grew and ate up the kelp, harming the environment. Fish depended on the kelp forests for cover, hence this led to a drop in the fish population. The sea otter species came dangerously close to extinction as a result of the rapid population fall.
The government has designated sea otters as a species of special concern in the United States, so this was very alarming.done action to safeguard them. The Pacific Coast environment was affected by the sea otter population collapse, which also had an impact on the fish population and kelp forests.
The overhunting of sea otters has led to the implementation of many conservation initiatives. Reintroducing sea otters to the Pacific Coast is one such initiative.
By lowering the sea urchin population and enabling the kelp to regenerate, this has helped to restore the ecosystem's equilibrium. In order to safeguard the species and assure its survival, the government has also imposed limitations on the hunting of sea otters.
Learn more about overhunting at:
https://brainly.com/question/7806673
#SPJ3
A blow to the head may cause diabetes insipidus by ______. A blow to the head may cause diabetes insipidus by ______. triggering the hypersecretion of hypothalamic-inhibiting hormones triggering the hyposecretion of hypothalamic-inhibiting hormones interfering with the normal transmission of nerve impulses to the posterior pituitary interfering with the normal transmission of nerve impulses from the posterior pituitary
Answer: interfering with the normal transmission of nerve impulses to the posterior pituitary
Explanation: A blow to the head may cause diabetes insipidus by interfering with the normal transmission of nerve impulses to the posterior pituitary. Interfering with the normal transmission of ADH (antidiuretic hormone) to the posterior pituitary is done via the axons of the hypothalamic neurons. The disease is a rare one, characterized by the excretion of large amounts of severely diluted urine which cannot be reduced when fluid intake is reduced. It is generally related to a tumor or an insult to the pituitary gland, where the hormonal signals it gives to the kidneys break down, and the kidneys do not conserve water, but express the water as urine.
What phenomenon is observed due to adhension
The excerpt is from an article that Roberto read for science class called “Using the Scientific Method to Study Tomatoes.”
The student performed an experiment to test his hypothesis about sunlight and plant height using two plants. He kept everything the same between two tomato plants except he exposed them to different amounts of sunlight. He also used a third plant as a control group, or a group in which no variables are manipulated to confirm the results.
Roberto critiqued the work. Which problem did Roberto most likely identify?
The sample size is too small.
Too many variables are manipulated.
It is not possible to keep the conditions the same.
Controls should only be used in studies of animals.
Answer:
The sample size is too small.
Explanation:
The process of elimination helped me find this answer.
It is possible to keep the conditions the same.
there are only 2 plants and one control, that's obviously not a lot.
and controls can be used on more than studying animals.
When using the scientific method you can use as many test subjects as you can so it can help you confirm. two plants are not a lot.
I've also had a teacher confirm that this is the correct answer.
edge 2020
The problem that Roberto most likely identify is the sample size is too small. The correct option is A.
What are scientific methods?Scientific methods are a series of methods that are done to extract correct and logical results. The method includes making a hypothesis, going through the process of calculations, making a conclusion, and then the result.
Roberto is studying the growth of tomatoes under sunlight. The hypothesis is that sunlight affects the height of the tomatoes. He took plant samples, but the study took time because the plant samples were too small. So taking the right size of plants is very necessary otherwise the whole study will do in vain.
Thus, the correct option is A. The sample size is too small.
To learn more about scientific methods, refer to the link:
https://brainly.com/question/7508826
#SPJ6
Stem cells renew tissues but are all lost in childhood.a) trueb) false
Answer:
False
Explanation:
Stem cells are different type of cells in human body that can develop into different other body cells like muscles cells or brain cells and they gave the capability to renew themselves through mitotic cell division.
Stem cells are not lost in childhood but can be use to treat diseases or infection, it can be use to grow new cells and replace damaged body cells.
what are the biological important of tomatoes
Answer:
They protect heart health
Tomatoes contain an antioxidant called lycopene, which is responsible for their red color. Research suggests that in terms of heart health benefits, it's more effective to eat tomatoes and tomato products than take lycopene supplements
Explanation:
Tomatoes are the major dietary source of the antioxidant lycopene, which has been linked to many health benefits, including reduced risk of heart disease and cancer.
They are also a great source of vitamin C, potassium, folate, and vitamin K.
Usually red when mature, tomatoes can also come in a variety of colors, including yellow, orange, green, and purple. What’s more, many subspecies of tomatoes exist with different shapes and flavor.
Explain why ecological succession occurs.
Ecological succession occurs due to the changes in physical environment and population of species. In an ecosystem, a species requires a particular set of environmental conditions under which they grow and reproduce.
Ecological succession occurs due to the changes in physical environment and population of species. In an ecosystem, a species requires a particular set of environmental conditions under which they grow and reproduce.
What is an Ecological succession?Ecological succession is the process by which plant communities develop over a period of time on the land where there was no vegetation.
The succession begins with a pioneer species such as lichens, some fungi species. Species such as lichen begins to secrete acids that begin to break the barren land into small particles.
The small particles mix with lichen remains and starts soil formation.
Thus, Ecological succession occurs due to the changes in physical environment and population of species.
To learn more about Ecological succession click here:
https://brainly.com/question/10167897
#SPJ2
The FRAP technique occurs in a series of steps. Select every statement that correctly describes a step in the FRAP procedure.A. The speed of repair of the fluorescent marker is measured.B. All fluorescent molecules in the cell are irreversibly bleached.C. The relative mobility of the fluorescently labeled molecule is measured.D. The molecule of interest is fluorescently labeled.
Answer:
The answer is "Option C and Option D"
Explanation:
FRAP is used only for protein motion management. It travels throughout two dimensions in the plasma membrane. It includes many available-moving or immobile proteins. This technology uses globally marked fluorescent bleaching products, and also includes the fluorescent proteins, but one particular area is washed.
Its protein arc changes are detected by fluorescence reappearance. The fluorescence reappears at a certain stage if the protein can move freely. When the proteins aren't able to move quickly, fluorescent dyes are recovered after a little period, and fluorescence would not resurface during that point if the enzyme is immobile.
biogechemical cycles on earth serve on earth serve a variety on different purpose. what do the biogechemical cycles have in common
Answer:
Son procesos naturales que reciclan elementos en diferentes formas químicas desde el medio ambiente hacia los organismos, y luego a la inversa. Agua, carbón, oxígeno, nitrógeno, fósforo y otros elementos recorren estos ciclos, conectando los componentes vivos y no vivos de la Tierra
Explanation:
Thursday/Friday:
(Read and write/answer question in yellow)
A student wants to test if giving dogs a toy to play
with makes their tail wag more. He gives dog toys to
one group, while another group of dogs does not
get any toys. He counts the number of times each
dog wags their tail.
What is the Independent Variable?(tested) The
Dependent Variable?(measured)
Yes
Answer:
I/V = giving the dogs toys
D/V = how many times the dogs wag their tails
Explanation:
dependent variable DEPENDS on the independent variable. If he gave a dog a toy and their tail wagged, he made that happen by giving the dog a toy, which is the independent variable because he made that happen, by changing the circumstance aka the independent variable aka the toys!
Sedimentary rock is converted into metamorphic rock with the addition of
A.nuclear energy
B. Kinetic energy
C. Potential energy
D. Heat energy
Explain the health effects of excess discretionary calorie consumption on the body. What alternative sweetener and fat choices can help address excess consumption of discretionary calories? Will the use/consumption of these alternatives address body weight?
Answer:
Descretionary calories are the calories left over after an individual meets his/her day by day supplement requirements.The result of Descretionary calories is high muscle fat ratio and weight gain or obesity.
Health risk :
Here and there high optional calorie intake may lead to weight on a people body optional calorie are high in fats, sugars and phenomenal admission of these kinds of food expands your danger factors for type 2 diabetes,heart ailment and disease.
Alternative sweetener and fat choices:
Fruits and vegetable with dressing as they are natural and high in sugar content and use fructose which absorbs in small intestine. The natural sweetener that can be alternatively use are stevia, aspartum, agave syrup, saccharin and sucralose and other natural alternatives.
Avoid oils high in saturated fat and include PUFA and omega rich unsaturated fat which is god for health.
These alternative food choices are known for providing less fat and no to less calories that help direct and indirectly in weight loss and lowers the risk of diseases.
1. List five things you use daily whose production is a direct result of microbial action. In addition to the product include what produces the products (bacteria. mold etc). and the brand names of the products. (This is a list and does not require grammatically correct sentences.)
Answer:
Various day to day use item are made because of direct from a huge amount of different microorganisms. microscopic organisms, molds, or a blend of these. Microorganism which are utilized in food creation such as alcohols, bakery products and esters are formed with fermentation.
1. Drinks like brew and wine ' - Saccharomyces cerevisiae
2. Cheese: Penicillium roqueforti and camemberti
3. Soy sauce: by utilizing aspergillus species particularly A. oryzae
4 Bread and pastry shop items : Saccharomyces cerevisiae or Yeast by producing Co2 by the process of fermentation.
5. Fermented milk items : Lactobacillus, Bifidobacterium and lactococcus.
Which is true about visible light?
A. It travels fastest through a medium, such as water or air.
B. It is the only part of the electromagnetic spectrum that
we can see.
C. It cannot travel through a vacuum.
Answer:
B
Explanation:
Light travels through medium but is fastest through vacuum, so C is wrong, and A is wrong. B is the correct answer.
WILL GIVE BRAINILY
Answer:
You need to make a graph of this data that is given to you.
Explanation:
What characteristics of organisms does the Linnaean system of classification use to give organisms their specific name?
A. genetic
B. evolutionary
C. environmental
D. physical
Answer:
D, Physical
Explanation:
Linnaean classification uses visible physical features. It has a kingdom-to-species taxonomy. Each species has a distinct two-word Latin name. Therefore, option (D) is correct.
What is Linnaean system of classification?The Linnaean system classifies organisms according to their outward morphological and behavioural similarities. A hierarchy of taxonomic levels, from the kingdom down to the species, makes up this structure. A distinct, two-word Latin name is bestowed for each and every species.
Carl Linnaeus, the "Father of Taxonomy," named and organised species. His hierarchical categorization scheme and binomial nomenclature system were major advances to taxonomy (two part naming method). The Linnaean system organises organisms into Kingdom, Phylum, Class, Order, Family, Genus, and Species. Latin names are global. A species' scientific name includes its genus. Italics or underlining cover the name. Humans, for instance. It's Homo sapiens.
Learn more about Linnaean system of classification, here:
https://brainly.com/question/24233730
#SPJ3
Is the overall air quality in this country is better now than it was 40 years ago.
Which stage of the cell cycle can lead to uncontrollable reproduction in mutated cells? (2 point)
O G2
O G1
O S
O M