The biological species concept is
A) applicable to all forms of life, past and present.
B) applicable to all present life-forms but not to fossil organisms whose reproductive behavior cannot be observed.
C) easy to apply to all present sexually reproducing organisms but harder to apply to asexual organisms and fossils.
D) sometimes difficult to put into practice even for present sexual organisms and useless for asexual organisms and fossils.

Question

Quizplus · Accepted Answer

The biological species concept is sometimes difficult to put into practice even for present sexual organisms and useless for asexual organisms and fossils. While the concept is straightforward (groups of organisms that can interbreed and produce viable offspring are considered to be the same species), in practice it can be challenging to determine whether two groups of organisms meet this criterion. Additionally, the concept does not apply to asexual organisms or to fossils, where reproductive behavior cannot be observed.

The Biological Species Concept Is