No single fossil proves that domesticated dogs and wolves evolved from a common ancestor. Yet almost all scientists agree that dogs and East Asian wolves share a common ancestor because of
evidence from-
A. similarities in body structure,
B. similarities in genetic makeup.
C. animal fossils found near early human sites.
D. All of the above support the existence of a common ancestor.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: