#Question id: 16848
#General Aptitude
#Question id: 4644
#Section 2: Evolution
The treeʹs horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V—Z) represent various common ancestors. Letʹs say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.
According to this tree, what percent of the species seem to be extant (i.e., not extinct)?
#Question id: 11176
#Section 2: Evolution
Species that reproduce once and then die are ______ species.
#Question id: 10578
#Section 2: Evolution
#Question id: 8689
#Section 2: Evolution
Which of the following statements best describes the rationale for applying the principle of maximum parsimony in constructing phylogenetic trees?