The ability of an organism to live so that it can survive to reproduce is called A) evolution.
B) fitness.
C) mutation.
D) variation.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Apuppy’s tendency to chew is inherited through which of the following? a. through learned behavior b.through genes c. through seasonal cycles d. through hibernation