Question

One characteristic that distinguishes a population in an extinction vortex from most other populations is that (A) it is a rare, top-level predator. (B) its effective population size is lower than its total population size. (C) its genetic diversity is very low. (D) it is not well adapted to edge conditions.

Answer 1

(C) its genetic diversity is very low.

What is meaning of Extinction?

Extinction is the final phase of a sort of creature or a taxon—typically a species. Although the ability to reproduce and bounce back may have been lost earlier, the death of the last member of the species is typically considered to be the moment of extinction.

Determining this point is challenging because a species' potential range may be quite wide, and is typically done after the fact. Due to this problem, there are phenomena like Lazarus taxa, in which a species that was thought to be extinct suddenly "reappears" after a period of apparent absence (usually in the fossil record). Estimates place the number of extinct species at over five billion, or more than 99% of all species that have ever existed on Earth.

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