What is the backbone of DNA composed of (choose all that apply)
nitrogen base

hydrogen bonds

sugar

phosphate

Answers

Answer 1

Answer:

nitrogen base

Explanation:

as it is nitrogen that is fixed to make protein bonds

Answer 2

Answer:

Nitrogen base

Explanation:

The backbone of DNA is composed of the nitrogen bases.


Related Questions

Nonmetals are defined as elements that generally cannot
conduct _____
and are poor conductors of heat.

Answers

Answer:

they can not conduct electricity

Non-metals are defined as elements that generally do not conduct electricity and are poor conductors of heat.

What are  elements?

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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Which statement accurately describes the chemical symbol of an element?The chemical symbol is always a single letter.The chemical symbol always starts with the same letter as the name of the element.The chemical symbol always begins with a capital letter.The chemical symbol can be shared by more than one element.

Answers

Answer:

The chemical symbol of an element always starts with an chemical letter so here the answer is that the chemical symbol always begins with a capital letter.

Explanation:

I need help with this please !!

Answers

fbjfjfjfjfjfjfjfjfbbfbfbfjfjfjjfjfjf
The correct answer is C

RNA bases pair up with RNA bases during when?

Translation, transcription, or replication?

No link pls

Answers

Answer:  transcription

Explanation:

An example of something that can be used to support the theory of evolution. Explain.

Answers

Anatomy. Species may share similar physical features because the feature was present in a common ancestor (homologous structures)

New molecules of DNA are synthesized by copying the genetic sequence of another molecule of DNA, which we call the template, so that __________. View Available Hint(s) New molecules of DNA are synthesized by copying the genetic sequence of another molecule of DNA, which we call the template, so that __________. the helical shape of DNA is conserved during cell division daughter cells are genetically identical to the mother cell there are two copies of each gene on a single DNA molecule DNA can serve as a template for the synthesis of other polymers such as proteins and carbohydrates

Answers

Answer:

during cell division daughter cells are genetically identical to the mother cell

Explanation:

DNA replication refers to the biological process by which two identical DNA molecules are produced from one original DNA molecule. DNA replication generates two identical DNA molecules known as sister chromatids which separate during mitosis. After this process, both daughter cells contain identical genetic information as the parent cell. Moreover, DNA replication is semiconservative because the two daughter DNA molecules that are synthesized have one parent (original) DNA strand and one newly synthesized complementary strand.​

Which organism below receives 10% of the available energy?


frog

eagle

grasshopper

grass

Answers

the answer is grass receives 10% of the available energy

You place a cell in a solution that contains 12 more water molecules than the inside of the cell. How will you know when the cell reaches equilibrium?
A. when there are equal numbers of water molecules on both sides
B. when the water molecules stop moving across the cell membrane
C. both A and B
D. The cell will not reach equilibrium because water cannot pass through the cell membrane.

Answers

Answer:

B

Explanation:

the water molecules will stop moving across the

cell membrane because the cell membrane has

the same amount of water as in the solution.

This process is called osmosis.

Placozoans: Please choose the correct answer from the following choices, and then select the submit answer button. bear little to no resemblance to animals such as cnidarians on the basis of genetic analysis. contain many genes for transcription factors that are present in cnidarians and bilaterian animals. are remarkable for their tissue complexity and organ development.

Answers

Answer:

The correct answer is - contains many genes for transcription factors that are present in cnidarians and bilaterian animals.

Explanation:

Placozoans are the simplest known metazoan organism known on earth and found in warm water and all over the globe. Placozoans are very small approximately 2 to 3 mm.

These are basal forms of marine free-living multicellular organisms. In the molecular studies, it is found that they have similar genes that are present in cnidarians and bilaterian animals for transcription factors.

what do chipmunks eat

Answers

Answer:

nuts-

Explanation:

Nuts seeds and fruits

North Carolina has more wind off its shore than any other Atlantic Coast state. How could this resource be best utilized to reduce carbon emissions and provide cleaner energy for the state?​

Answers

Answer:

C. Offshore wind farms could be constructed to generate wind energy, which reduces fossil fuel use throughout the state.

Explanation:

Option C is the correct answer.

Actually, wind energy is another alternative to fossil fuel. If North Carolina has more wind off its shore, then it is best to utilize it to reduce carbon emissions. It will help produce cleaner energy for the state.

So, the best way it can be utilized to reduce carbon emission is by constructing offshore wind farms in order to generate wind energy. This wind energy will help to reduce fossil fuel emissions.

Answer:

C. Offshore wind farms could be constructed to generate wind energy, which reduces fossil fuel use throughout the state.

Explanation:

Wind power is an excellent option for North Carolina homes, farms, businesses, schools, and utilities interested in producing clean, independent electricity.

PLZZZZ HELPPPP!!!!!
.........

Answers

Answer:

c. Compression.

Explanation:

Compression is the primary way from which folded mountains are formed. Fold mountains are created where two or more of tectonic plates of earth are pushed together. Due these collision, compressing boundaries and rocks are  folded into rocky hills, mountains, and entire mountain ranges. Fold mountains are formed through a process called orogeny which is an event that leads to both structural deformation of the Earth's lithosphere at the margins of convergent plate.

i) Explain how the biochemical reaction can still occur if the blood sugar level is lower
than the normal range.

Answers

Answer:

To produce energy from available sugar.

Explanation:

The biochemical reaction can still occur if the blood sugar level is lower  than the normal range because energy is needed by the body for its activities. The biochemical reactions helps in producing energy in the form of ATP that is needed by the body for its different activities. The lower level of sugar in the blood does not fulfil the needs of body but provides some energy for it so that's why the body produces energy from available sugar present in the body.

Which of the three components that plants need enter the plants through their stomata?

Answers

The role of stomata in photosynthesis is often undervalued. But, these tiny pores control the entrance of carbon dioxide and the exit of oxygen and water vapor.

Which statement is a testable hypothesis? The dog salivating is an example of responding to stimuli. If the dog is given food, then it will be happy. The dogs salivating means it is hungry. If the dog hears the bell, then it will begin to salivate,​

Answers

Explanation:

The dog salivating is an example of responding to stimuli

Answer pls i need help

Answers

genettic draft to muration

Which of the following terms refers to the commercial production of decorative plants and flowers?


pomology

botany

floriculture

horticulture

Answers

Answer:floriculture

Explanation:

what happens if plant protoplasts are placed in distilled water​

Answers

Answer:

Protoplasts are plant cells that have had their cell walls removed. What happens if plant protoplasts are placed in distilled water? A They get larger and become turgid.

When the plant protoplast is placed in distilled water ; It becomes Turgid

When protoplast is placed in a distilled water, the distilled water flows into the protoplast and this makes the protoplast to become turgid and this is due to absence of the plants cell wall and also the difference in the concentration of the contents of the protoplast and the distilled water. Protoplast represents the plant cell without the presence of the cell wall.

Hence we can conclude that when the plant protoplast is placed in distilled water it becomes Turgid.

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The diameter of a metaphase chromosome is about 1400 nm, whereas that of the DNA double helix is 2 nm. This means that DNA is coiled into a structure with a diameter 700 times larger than itself. The diameter of a human hair is about 80 micrometers (0.003 inch). Of a human hair were coiled into a structure with a diameter 700 times larger than itself, the diameter of the coiled human hair would approximate that of a:

Answers

Answer:

The answer is "soda can (about 2 inches)".

Explanation:

In this question, when it is relative to the having the human hair with the d=80 mm (0.003 inches) and the collecting into the structure with the d=700 times larger than itself that will be produced with the coiled of human hair with the d that is = 80 [tex]\times[/tex]700 mm= 56,000 or 2.16 inches, that's why the answer is a soda can's which is equal to about 2 inches.  

According to modern cell theory, energy flow occurs around
the outside of cells.
TRUE
FALSE

Answers

Answer:

FALSE

Explanation:

Cell theory defines the cell being the fundamental unit that is the structural and the functional basis. The energy flows inside the cell. Thus, the statement is false.

What is modern cell theory?

Cell theory gave the organizational and fundamental basis of the cell that is the same for both the eukaryotic and the prokaryotic cell including the multicellular and single-celled organisms.

The cells of the organisms all come from a pre-existing cell through reproduction and cell division. The cells are important and crucial for cellular and metabolic fiction.

The energy flows inside the cell in the mitochondria of the cell that power and act as fuel involved in the working of the cell by breaking the bonds stored in the sugar molecule.

Therefore, the statement is false.

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Is an adaptation on one organism necessarily useful on another? Explain with examples.

Answers

Answer:

Do you mean one organisms offspring or same species?

List four functions of the muscular system.

Answers

The main functions of the muscular system are as follows:

1. Mobility

The muscular system’s main function is to allow movement. When muscles contract, they contribute to the gross and fine movement.

Gross movement refers to large, coordinated motions and includes:

•walking

•running

•swimming

Fine movement involves smaller movements, such as:

•writing

•speaking

•facial expressions

The smaller skeletal muscles are usually responsible for this type of action.

Most muscle movement of the body is under conscious control. However, some movements are reflexive, such as withdrawing a hand from a source of heat.

2. Stability

Muscle tendons stretch over joints and contribute to joint stability. Muscle tendons in the knee joint and the shoulder joint are crucial in stabilization.

The core muscles are those in the abdomen, back, and pelvis, and they also stabilize the body and assist in tasks, such as lifting weights.

3. Posture

Skeletal muscles help keep the body in the correct position when someone is sitting or standing. This is known as posture.

Good posture relies on strong, flexible muscles. Stiff, weak, or tight muscles contribute to poor posture and misalignment of the body.

Long-term, bad posture leads to joint and muscle pain in the shoulders, back, neck, and elsewhere.

4. Circulation

The heart is a muscle that pumps blood throughout the body. The movement of the heart is outside of conscious control, and it contracts automatically when stimulated by electrical signals.

Smooth muscle in the arteries and veins plays a further role in the circulation of blood around the body. These muscles maintain blood pressure and circulation in the event of blood loss or dehydration.

They expand to increase blood flow during times of intense exercise when the body requires more oxygen.

Scientists have determined that the codes for amino acids are?
a) different in bacteria and viruses.
b) different in humans and bacteria.
c) universal.
d) never the same.​

Answers

Answer:I

I think its B

Explanation:

Eubacteria are found in harsh climates, like hot springs. True or False?

Answers

Eubacteria are found in harsh climates, like hot springs: TRUE

Answer:

True

Explanation:

Which thesis statement best suits this persuasive excerpt ?

Smoking Doesn’t Just Hurt Your Health

(excerpt)

The arguments about smoking are usually centered around its effects on the health of smokers and nonsmokers alike. Entire ad campaigns have been developed around the idea of educating smokers about the risk that smoking poses to their health. Chances are you’ve encountered the photo of that diseased lung in your health class. Lawsuits against tobacco companies have gained a lot of media attention. Cities have gone so far as to ban smoking inside buildings, restaurants, and bars. But have you ever stopped to think about what smoking does to the environment?

It is easy to guess that smoking might pollute the air. Did you know that tobacco smoke contains more than 4,000 chemicals? Fifty of those chemicals are known to cause cancer, and two hundred are known poisons. Think about the fact that 20 percent of Americans smoke. Can you imagine how many chemicals are released into the air each year?

Cigarettes also account for an estimated 1.7 billion pounds of trash each year. Some people say the ban on smoking indoors in some cities could contribute negatively to this statistic. Because people are smoking outside, the number of cigarette butts they leave behind may increase dramatically.

A.
Smoking pollutes the air in public places, such as buildings, restaurants, and bars.
B.
Smoking not only produces negative effects on human health but also on the environment.
C.
Smoking damages the environment more severely than it damages human health.
D.
Smoking increases water pollution when cigarette butts are dumped into waterways.
E.
Smoking harms wild animals by polluting and destroying their natural habitats.

Answers

Answer: B. Smoking not only produces negative effects on human health but also on the environment.

Smoking not only produces negative effects on human health but also on the environment is best suited thesis statement to this persuasive excerpt.

How smoking effects our body?

Smoking causes lung disease, pulmonary disease, emphysema, diabetes or many more problems.It might be cause throat cancer or mouth cancer. Cigarette have tobacco, carbon monodioxide, benzene, nicotine, formaldehyde types of chemicals which are extreme harmful for body as well as environment.

Smoking is harmful for body as well as environment. Tobacco smoke contains more than 4,000 chemicals. Fifty of those chemicals are known to cause cancer, and two hundred are known poisons. These all are spread over in air and that air intake by the non smokers.

Cigarettes also account for an estimated 1.7 billion pounds of trash each year, so it produces the pollution in air dramatically.

Hence, option 'C' is correct.

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What is one role of ATP in the light independent reaction of photosynthesis

Answers

ATP supplies the energy to produce glucose and other carbohydrates. In the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen.

What is the purpose of the chemical messengers that pass between cells? Check ALL that apply.


a To keep the rate of cell division equal with the rate of cell death.

b To help cells reproduce at a rapid rate.

c To inhibit cell death so that fewer new cells are needed.

d To help regulate the rate and timing of cell division.

Answers

Answer:

B and D seem most credible although I am not 100%

Hope this helped.

I'll give brainlist!! Please helppp‼️‼️


1. How many years does the table include, from the first species to the last?

2. From the fossil evidence shown, how did the forefeet change over time?

3. From the fossil evidence shown, how did the skills change over time?

4. How might the environment in which each of these species lived have affected the evolution of horses?

Answers

Answer:

1: 50 million years

2: The forefeet changed over time by the bones merging into one to create the hoofed feet that we are used to today.

3: Their teeth and skull changed over time to better fit the environment and food they fed on. Their feet and hight changed based on the physical requirements of the environment like walking across dense forests vs open prairies and how they had to move to access food.

4: The environment affected the way the horses evolved because they had to evolve to better fit and survive/thrive the new environments they lived in.

If the population of moths is found to have 100% dark colored individuals, would it be possible for them to survive if humans came and cleaned up the pollution on the trunks of the trees; returning them to a light colored bark?

Why or why not?

Explain your reasoning.

Answers

Answer:

Decrease occur in the population.

Explanation:

It would be impossible for dark colour moth to survive if humans cleaned up the pollution on the trunks of the trees and returning them to a light colored bark because the dark colored moths can easily be seen by their predators. The dark colour of trunk helps the dark colored moths to hide from their predators so if the black colour of the trunk are turn into light colour so there is decrease occur in the population of black colored moths.

Which characteristics are used to differentiate among the six kingdoms?
a. body type, coelom, cell type, movement, size
b. body type, cell type, cell structure, nutrition
c .cell structure, movement, cell type, nutrition
d . nutrition, coelom, cell structure, cell type, size

Answers

Answer:

c

Explanation:

cells help you live

Answer:

C

Explanation:

Answer above

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