Campbell Biology 11th Edition by Lisa Urry,Michael Cain,Steven Wasserman,Peter Minorsky,Jane Reece

تمرين 3

According to the punctuated equilibria model,
A) given enough time, most existing species will branch gradually into new species.
B) most new species accumulate their unique features relatively rapidly as they come into existence, then change little for the rest of their duration as a species.
C) most evolution occurs in sympatric populations.
D) speciation is usually due to a single mutation.