Which is true about adaptations?

a. they are acquired during an organism's lifetime.
b. they are learned from other organisms.
c. they are lost during an animal's life.
d. they are genetically acquired traits.

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?

Everything in the universe originated from a single point. how was it possible for everything in the universe to have occupied a single point in space?