Evidence shows that hippos and whales are closely related organisms. How might evolution and adaptation account for similarities and differences between them?

The fossil record suggests that whales ________.

A) are not closely related to dolphins and porpoises, despite a superficial similarity

B) are closely related to land mammals such as pigs, hippos, and cows

C) are descended from one branch of marine reptiles

D) once had well-developed hind flippers

How do the structures in an organism relate to their functions?

How does negative feedback act to maintain homeostasis in living things?

Give an example of how structure and function are related in an organism.

Briefly describe the basic characteristics that all living things on Earth have in common.

In general, greater biodiversity exists closer to Earth's equator than in areas closer to Earth's poles. What does this mean in terms of the number of species that are found in these regions?

The prefix homeo-comes from a Greek word that means "same." The suffix -stasis comes from a Greek word that means "stoppage," or "standstill." How are these definitions related to the meaning of homeostasis?

The prefix bio- means "life." How does this meaning relate to the definitions of terms that contain the prefix bio-?

Which of the following is NOT a characteristic of mammals? A. endothermic. B. three-chambered heart. C. hair. D. mammary glands.

Explain the differences between the terms in the following sets. observation, data

Analyze the relationship between a hypothesis and a theory.

How does the addition of a catalyst affect the energy of activation of a chemical reaction?

Describe one similarity and one difference between the two terms in each of the following pairs. biosphere, ecosystem