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The Distribution of the Percentage Extinction for Genera of Marine

question 19

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The distribution of the percentage extinction for genera of marine animals throughout Phanerozoic shows that there has/have been __________ great mass extinction(s) over the past 500 million years that claimed 40 percent or more of these genera.


Definitions:

Gametes

Reproductive cells (sperm in males and eggs in females) that carry half the genetic information of an organism and combine during fertilization.

Allele Frequencies

The relative proportions of different alleles of a particular gene in a given population.

Inheritance of Acquired Characteristics

An outdated scientific theory that proposed individuals can pass on traits acquired during their lifetime to their offspring.

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