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Dvinal [7]
3 years ago
7

Natural selection chooses which variations become prevalent in a population through environmental pressures. Which of these is a

n environmental pressure which can lead to natural selection?
Biology
1 answer:
Maru [420]3 years ago
8 0
A drought could decrease an amount of food, or a competitor for the same food could.
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A new microorganism has been isolated from hot springs in Yellowstone National Park. It consists of single cells, which appear t
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Answer: B- Bacteria

Explanation: Bacteria are infinitesimal organisms that have single cells that grow in different atmospheres. They have an easily understood inside arrangement. Their cells are normally surrounded by two shielding coverings which are an external cell continuous vertical structure and a cell pliable sheet-like structure acting as a boundary inside. However, some bacteria do have a third shielding sheet furthest from the center named the capsule.

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What happens a river ages
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D. the floodplain shrinks
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An igneous rock is found on the ground and has no identifiable crystals. What is the most likely origin of this rock?molten mate
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The answer would be: <u>Molten material that cooled quickly.</u>


Igneous rocks are formed by the cooling of molten material. So we can cross out the last two choices. The rock has no identifiable crystals so it is most likely an Extrusive igneous rock. They form on the surface where they cool quickly.


Those that form underground are called intrusive rocks. They cool slowly allowing enough time for crystal formation.

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3 years ago
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In 1990, scientists at the National Institutes of Health used gene therapy to try to treat a 4-year-old girl suffering from seve
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<u>Answer:</u>

<em>B. Many genetic diseases would be curable. </em>

<u>Explanation:</u>

Gene therapy is intended to acquaint hereditary material into cells in order to compensate for faulty or mutated genes or to make a helpful protein. On the off chance that a faulty gene makes a beneficial protein be flawed or missing, gene therapy might have the option to present a typical duplicate of the gene to reestablish the function of the protein.  

A gene that is embedded straightforwardly into a cell as a rule doesn't work. Rather, a bearer or carrier called as a vector is hereditary built to insert the desired gene.

4 0
3 years ago
Which of the descriptions below does not explain the effects of air pollution on the respiratory system?
NeTakaya
I believe that the best answer among the choices provided by the question is <span>It could increase carbon dioxide uptake in alveolar sacs.</span>
Hope my answer would be a great help for you.    If you have more questions feel free to ask here at Brainly.
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