A catastrophic event that causes many different species to disappear in a short period of time is known as a

A. macroevolution.
B. punctuated equilibrium.
C. mass extinction.
D. background extinction.

C

Explanation: This is the definition of mass extinction.

Extinction

Explanation:

Extinction is the disappearance of all members of a species. A species is considered extinct from the moment the last individual dies. In the case of species that reproduce sexually, extinction is generally unavoidable when only one individual of the species remains, or only individuals of the same sex, since there is no way they can reproduce to give continuity to their species.

enzyme speed up the reactions

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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