Often organisms seem similar in their outward appearances. for example, a porpoise and a shark seem closely related, but they are not. such similarity is the result of a. genetic equilibrium. b. convergent evolution. c. adaptive radiation. d. artificial selection.

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

An animal cell (left) and a plant cell (right) are shown. which organelle, labeled x in the diagram, is found in both plant and animal cells?

What is the starting point in replication called