Why do scientists think that whales evolved from ancient mammals and not ancient fish

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates