Chicken nugget utts and gina
Echinoderms are more closely related to human than to a jellyfish because they are biltarian.
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Answer:
I think it's
A <u>mass </u>extinction occurs when many species go extinct in a relatively short period of time.
Explanation:
Mass extinction is usually defined as a loss of about three-quarters of all species in existence across the entire Earth over a “short” geological period of time. Hence, I think the answer is correct.
Both are processes that lead to learning. Classical conditioning pairs two stimuli and works with involuntary responses, while operant conditioning pairs behavior, response, and works with voluntary behaviors.
Explanation:
From smallest to biggest
Gene, DNA, Chromosome, Cell