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Makovka662 [10]
3 years ago
14

HIV weakens the immune system by killing

Biology
1 answer:
san4es73 [151]3 years ago
4 0
T-cells.These<span> are cells that help the immune system fight against disease and infections in the body. </span>
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A population of mussels was observed in a particular ecosystem. Crabs have recently been observed occupying this ecosystem, whic
Zina [86]

Mussels are molluscans and are freshwater animals. The change in the environment led to new traits of mussels, it underwent natural selection and the thick shells have high chances of survival.

<h3>What is natural selection?</h3>

Natural selection is a process of nature that eliminates the organism with less survival and unfit traits while selecting the organisms with better traits of survival in the altered conditions.

The arrival or the introduction of the crabs in the environment altered the previous habitat of the mussels and led to the adaptation of the better trait quality in the mussel species.

The trait of the thick shells underwent natural selection as they were favoured for the changed conditions. The mussel having thick shells have high chances of survival over thin-shelled mussels as the crab will find it hard to attack the thick-shelled mussels.

Therefore, option A. change in environment, option B. natural selection and option E. chances of survival are the correct statements.

Learn more about the natural selection here:

brainly.com/question/10715606

6 0
2 years ago
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explain how a change in the sequence of nucleotide in a strand of DNA might cause a protein to malfunction
Diano4ka-milaya [45]

Answer: Proteins are made using DNA as a template. The DNA is turned into RNA, and the RNA is then turned into DNA. 

A change in these nucleotides could end up making some part of the protein different. A single nucleotide change could be silent (no change in the protein) or could change a single amino acid (amino acids are the building blocks of proteins). If that was an important amino acid, the protein might not function at all! A silent change can occur because the same set of nucleotides sometimes makes the same final amino acid (for example, reading "gcc" "gca" "gcg" or "gct" nucleotides all mean "alanine" amino acid). 

The deletion of a single nucleotide, or the addition of one, can change the entire sequence of amino acids that come after it! Nucleotides are read in sets of three, so this throws off how the DNA is read. If would be like turning "The brown fox jumps over the dog" into "The gbrow nfo xjump sove rth edo g". Completely different! All of the words are thrown off.

I know it is long but I hope it helped

:D

7 0
4 years ago
Solid, crystal-like substances that are formed in the kidneys due to not drinking enough water or high levels of protein, sodium
Ludmilka [50]

Answer:

The correct answer is - stones.

Explanation:

Kidney stones are medically called renal calculi or urolithiasis. These are normally hard and very small minerals and salts made stones that deposites inside your kidneys. Kidney stones can be formed due to several reasons such as an unhealthy diet with higher salt, soda, and sugar constituents, high dose of minerals, dehydration, or less drinking water

To decrease the risk of forming kidney stones or if one is experiencing kidney stone should drink enough water which helps to remove formed or forming deposits of minerals.

3 0
3 years ago
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Two companies sell software products. In 2006, Company 1 had total sales of $14.3 million. it's marketing department prejects th
trasher [3.6K]
Company 1 :14.3+1.4x company 2: 9.8+2x
4 0
3 years ago
If carbon dioxide is completely removed from a plants environment , what would you expect to happen to the plants production of
Zigmanuir [339]
The plant's production of high-energy sugars would reduce significantly. I'm not going to say that the plant would completely stop producing the sugars because it has to respire, and one product of respiration would be carbon dioxide. This carbon dioxide would be recycled so that the plant can photosynthesize and produce sugars.
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3 years ago
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