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ratelena [41]
3 years ago
15

Pollination can occur in a single plant or between two plants. A. true B. false

Biology
1 answer:
Lilit [14]3 years ago
6 0

Answer:

true

Explanation:

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Which body system protects the body against invasion by pathogens? A. nervous system B. muscular system C. excretory system D. i
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Sea anemones can reproduce sexually or asexually. What would be the most likely advantage a sea anemone would have to reproduce
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Olympic athletes train in Colorado Springs, Colorado because this location is at high altitude and near the 14,000 foot Pikes Pe
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Answer:

A: Oxygen levels are low and, therefore, more red blood cells are produced, giving the athletes an advantage when competing at lower altitudes.

Explanation:

<em>At high altitudes, the partial pressure of oxygen is lower compared to lower altitudes</em>. The body system try to adjust to lower oxygen level by undergoing several physiological changes. Depending on the duration spent in high altitude, the body can either try to adjust in the short term or acclimatize for a longer term.

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The increase in red blood cell production correspondingly increases the oxygen-carrying capacity of the blood as a result of increased hemoglobin. This condition persists for a few weeks even after the body returns to lower altitude where oxygen is adequate. Increased oxygen capacity means the rate of energy production (through respiration) within the body will also increase

<em>Hence, those who acclimatize to high altitude usually experience increased capillary density, tissue perfusion and improved athletic performance at lower altitudes. </em>

The correct option is A.

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Explanation:

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