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crimeas [40]
3 years ago
11

AYO HELP MEEEEE VBJKEBADHK

Biology
1 answer:
liq [111]3 years ago
4 0

humans probably used selective breeding to cause alpacas to have more wool. If alpacas have more wool they are able to get more material to make clothes or blankets.

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The _____ sends out an electrical impulse that regulates the heartbeat.
olga nikolaevna [1]

Answer: The SA node

Answer choices are:

<span>A.      </span>The AV node

<span>B.      </span>The SA node

<span>C.      </span>The purkinje fibers

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The SA node<span> is the heart's natural pacemaker consisting of a cluster of cells located in the upper part of the wall of the right atrium. (the right upper chamber of the heart). The electrical impulses are produced and sent out from there to regulate heartbeat. This is also called the sinus code.  </span>

3 0
3 years ago
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Minchanka [31]

Correct option a) Increased plasma volume.

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The volume of the brain tends to remain about the same, it has been found that chronic stress in healthy individuals can causes areas of the brain associated with emotions , metabolism and memory of that individual to be shrink slowly.

Stress can also be positive which is distress , getting job promotion or being given grater responsibilities keeping us alert and ready to avoid danger. It can became negative if a person faces continuous challenges without relief or relaxation between challenges.

To learn more about  chronic stress here

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7 0
1 year ago
The pH of water is _____ because it contains an equal amount of H+ and OH- ions.
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5 0
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Explain how hyphae help a fungus absorb food
amm1812

Answer:

Explanation:

a  fungus named penicillin produces a substance that kills the bacteria near it. The mold produces the antibiotic penicillin. How do fungi help plants grow? The hyphae spread underground and absorb water and nutrients from the soil for the plant.

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