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viktelen [127]
4 years ago
5

What is extinction and why does it occur?

Biology
2 answers:
lana66690 [7]4 years ago
6 0

Extinction is the dying out of an entire species. Extinctions have occurred regularly throughout Earth's history. At certain times, major climate changes, catastrophic events such as large meteorite impacts, or massive volcanic activity on earth have caused the Extinction of large numbers of species.

Maksim231197 [3]4 years ago
5 0

Answer:

the termination of an organism or of a group of organisms, usually a species. it occurs when the last individual of a plant or animal species dies out or due to human activity, such as over hunting or through habitat destruction.

Explanation:

this should break it down clear enough

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Answer:

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Explanation:

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3 years ago
If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?
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a. a complete loss of voluntary movement

Explanation:

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These motor neurons of ventral root conduct nerve impulses from the CNS to effector organs. Muscles and glands are the effector organs. As these effector organs receive motor information, voluntary movements are generated. If the ventral root of the spinal nerve were cut, the effector organs will not get the motor information and no voluntary movements will be generated.

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