Which Understanding Do Modern Biologists Have That Darwin Did Not

Multiple Choice

Which understanding do modern biologists have that Darwin did not have?

A) The tendency of individuals to resemble their parents
B) The common ancestry of species that exist today
C) The details of genetic inheritance
D) The operation of natural selection on changes in species over time
E) The greater similarity of species in temperate and tropical regions of South America than of species in temperate regions of South America and Europe