Molecular clocks
a. take advantage of the fact that only neutral mutations do not happen at a steady rate.
b. take advantage of the fact that all mutations affect the fitness of an organism.
c. take advantage of known mutation rates to estimate how long ago organisms shared a common ancestor.
d. take advantage of the fact that all mutations happen at a steady rate.
all of the following are important properties of prokaryotes except
a. prokaryotes are used to make many products for humans.
b. prokaryotes are often decomposers and enable recycling of nutrients.
c. prokaryotes form the base of many food chains, especially those found within the open ocean.
d. prokaryotes convert nitrogen-containing molecules into forms that can't be used by other organisms.
all of the following patterns were witnessed by darwin except that species vary
a. locally.
b. over time.
c. within very short spans of time.
d. around the world.
the scientific name for a white oak is quercus alba; the scientific name for a red oak is quercus rubra.
what does this tell you about the organism?
a. white oaks are grouped in the genus quercus.
b. red oaks are grouped in the species quercus.
c. red oaks are grouped in the genus alba.
d. white oaks are grouped in the same species category as red oaks.