1. A complex individual that consists of organ systems is known as a/an

A. community.

B. population.

C. organism.

D. tissue.

E. species.

2. All of the ecosystems on the planet together are called the

A. atmosphere.

B. hydrosphere.

C. biosphere.

D. lithosphere.

E. stratosphere.

3. Which of the following statements most correctly defines homeostasis?

A. All living organisms are alike.

B. Living organisms do not change much over time.

C. Human beings and other animals acquire materials and energy when they eat food.

D. It takes energy to maintain the organization of the cell.

E. Cells and organisms must be able to maintain a fairly constant internal environment.

4. Four million years ago, horses were rather small compared to today's horses and had relatively stocky bodies

with a straight shoulder and thick neck. This statement is an example of which biological concept?

A. metabolism

B. evolution

C. development

D. homeostasis

E. reproduction

5. Which of the following is not a basic characteristic of all living things?

A. Living things are organized.

B. Living things acquire materials and energy.

C. Living things contain a nucleus and organelles.

D. Living things reproduce.

E. Living things grow and develop.

6. Choose the CORRECT order (1-5) of increasing complexity/organization.

A. (1) tissues, (2) organ systems, (3) cells, (4) organs, (5) organism

B. (1) cells, (2) organ systems, (3) tissues, (4) organs, (5) organism

C. (1) tissues, (2) organs, (3) organ systems, (4) cells, (5) organism

D. (1) cells, (2) tissues, (3) organs, (4) organ systems, (5) organism

E. (1) organism, (2) organ systems, (3) organs, (4) tissues, (5) cells