"REPRODUCTIVE ISOLATION" needs to occur for speciation to happen.....
This is called a behavioral pattern. This is something deer have learned over time that gives them an advantage in the wild.
The answer to your question is B.
Adenine,guanine,cytosine,and uracil
In 1969, whittaker proposed moving the prokaryotes from the kingdom plantae to a separate kingdom due to structural and metabolic differences.
