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Answer:

double rings(two)

Explanation:

The purines(adenine and guanine) have a two-ringed structure consisting of a nine-member molecule with four nitrogen atoms.

Answer:

The rate of passive transport depends on the permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins. The four main kinds of passive transport are simple diffusion, facilitated diffusion, filtration, and/or osmosis.

Explanation:

I'm sorry if it is wrong

Answer:

cells

Explanation:

musscle tissue is made up of muscle cells

cells make up organs organs make up organs systems and organ systems make up organisms

Answer:

DNA is the genetic information used to make proteins, and it contains the hereditary traits of organisms. There are two types of DNA: mitochondrial DNA, which you can only get from your mother, and nuclear DNA, which is a combination of both your ancestors' DNA.

Answer:

Growth of existing cells in G1

Creating replacement cell for expired cells (apoptosis)

Repair of damaged tissues

Regulates body cells to maturation

Prevents out of control cell cycle leads to cancer

Slowing the reproduction of some cells such as neurons G0

Producing identical cells to the one that already exist to maintain shape, structure and functions of cells in the human body

Explanation:

Answer:

meiosis

Explanation:

The germ cells that enter meiosis become oocytes, the source of future eggs. Consequently, females are born with a finite number of oocytes arrested in the first meiotic prophase. Within the ovary, these oocytes grow within follicle structures containing large numbers of support cells. (i don't know if the explanation is correct but i know that it is meiosis)

Answer: vegetation protects against erosion from raindrops and helps been together soil and regolith

Explanation:

Answer:

I think B

Explanation:

The circulatory system is the method of transport in plants and animals. Animals must have nutrients and oxygen reach every cell in their body. Plants must have nutrients and carbon dioxide reach every cell in their "body." The circulatory system is how these things are carried around the living organism.

is oxidation reaction

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.

Explanation:

Explanation:

A keystone species is an organism that helps define an entire ecosystem. By keeping populations of mussels and barnacles in check, this sea star helps ensure healthy populations of seaweeds and the communities that feed on them—sea urchins, sea snails, limpets, and bivalves.

Answer:

By keeping populations of mussels and barnacles in check

Answer: Kathrin Plath and William Lowry

Explanation:

Kathrin Plath and William Lowry and researchers at the University of California in Los Angeles(UCLA) were able to reprogram adult cells to become develop properties of embryonic stem cells which are very important as they can become any type of cell in the body which can have very important implications in medicine.

They did this by genetically altering the cells to enable them age backwards to a point where they were like the aforementioned stem cells.

Answer:

25%

Explanation:

If they are both heterozygous, it means they both have a Dd genotype. If you draw out a punnet square Dd x Dd you end up with the following possible genotypes for the puppy:

DD, Dd, Dd, dd

In order for the puppy to be deaf, it must be dd since deafness is recessive, which is 1/4 (25%)

The chance that the puppy will be deaf is 25%. The correct option is B.

The term "allele" refers to the alternative form or versions of a gene. People inherit one allele for each autosomal gene from each parent, and we tend to categorize the alleles.

We usually refer to them as normal or wild-type alleles, or abnormal or mutant alleles.

If they are both heterozygous, they have the Dd genotype. As per the Punnett square Dd x Dd, one can see the the following genotypes for the puppy:

DD, Dd, dD, dd

Because deafness is recessive, the puppy must be dd, which is 1/4 of the population.

Thus, the correct option is B.

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Answer:

The answer is anaerobic respiration

Explanation:

This process doesn't need any oxygen and produces 2 ATP.

Answer:

its too blurry

Explanation:

Answer:

Stars with a greater overall mass are  

1. (brighter)

and  

2. (hotter)

, and they consume their nuclear fuel  

3. (faster)

.

Explanation:

Answer:

Brighter, hotter, faster

Explanation:

Answer for edmentum test

Answer:

because some chemical reactions release gases which may be odourless or may have smell, in order to identify it it is necessary to have a good sense of smell.

Answer:

Glaciers

Explanation:

About three-quarters of Earth's freshwater is stored in glaciers. Therefore, glacier ice is the second largest reservoir of water on Earth and the largest reservoir of freshwater on Earth.

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Answer:

If the solute carries a net charge, however, both its concentration gradient and the electrical potential difference across the membrane, the membrane potential,influence its transport. ... Thus, transport by carriers can be either active or passive, whereas transport by channel proteins is always passive.

Explanation:

Answer:

Yes.

Explanation:

Yes, measurements should be more accurate if these scientific error are removed. Yes, we must perform more trials in order to verify the experiment. Environmental factors, such as the laboratory's lighting or temperature, has a great effect on the experiment and can cause error. In this experiment the errors occur such as instrumental, environmental, procedural, and human. All these error causes inaccurate readings of experiment so greatly affect the experiment.

Answer:

A. To gather and respond to information

Explanation:

Answer:Both plants and animals reproduce sexually, producing a male and female gamete, which fuse to form a zygote. However, plants are also able to reproduce asexually, unlike most animals. ... In sexual reproduction in animals, the two gametes are the spermatozoa and the oocyte, which when fused become the ovum.

Explanation:

Answer:

1) Different

2) Different

3) The same

4) The same

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Answer:

Explanation of previously stated factors resulting in a declining bee population.

Explanation:

The user should submit further information on why the bee population is declining. My personal recommendation would be to introduce a reason and then explain it.

In response to your stated reasoning(s), assuming they are correct, this would be giving information such as:  What can pesticides do to bees? What are some statistics showing habitat destruction. What do bees need to be nourished?

I would not recommend ending your answer with "and more".

By submitting this answer and referring to the work and resources given I trust you're in accordance with the Brainly Honor Code and I take no responsibility for any laws or rules broken with you using this platform.

Answer:

The U.S. voluntary market defines green power as electricity produced from solar, wind, geothermal, biogas, eligible biomass, and low-impact small hydroelectric sources. ... Such fuel sources include the sun, wind, moving water, organic plant and waste material (eligible biomass), and the earth's heat (geothermal).

Explanation:

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Answer:

The similarities and differences between DNA and RNA are given as follows:

Explanation:

Similarities:

Both are made up of nucleotides

Nucleotides are made up of nitrogenous bases, a pentose sugar, and the phosphate backbone.

Both DNA and RNA have four nitrogenous bases each - two purines two pyrimidines

Purine binds with pyrimidines

Differences

DNA uses the nitrogenous bases adenine, cytosine, thymine, and guanine whereas RNA uses adenine, cytosine, uracil, and guanine. Uracil lacks a methyl group on its ring

RNA contains the sugar ribose that has an extra -OH while DNA contains the deoxyribose sugar that has H at the 2 carbon.

DNA is double-stranded while RNA is a single-stranded

Under alkaline conditions, DNA is stable while RNA is not stable.

Answer:

when water levels are low due to water stress, photosynthesis can slow or even stop, causing internal food supplies vital to other processes to diminish or disappear -- yellowing may also occur if photosynthesis stops completely.

Explanation:

If there was no water available for photosynthesis, the cellular level of the

plant will be affected negatively in areas such as shrinking of cells and

decrease in photosynthetic activities.

Plants require water to produce food in the process known as

photosynthesis. When there is no water the photosynthesis is slowed down

and the cells begin to shrink.

The shrinking of cells then results to the wilting and yellowing of leaves of the plant.

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Answer:

B. small disturbance (a p e x)

Answer:

B. Small disturbance

Explanation:

I'm just trying to make this question easier to find than the other ones that have incorrect answers. Alright, hope this helps someone! Have a nice day :)