(question). What live in large colonies and have complex social relationships.
Options:
- (A) Insects
- (B) potatoes
- (C) plants
- (D) parasites
- (E) honeybees
- (F) tortoises
- (G) bees
- (H) animals
(answer). Insects may live in large colonies and have complex social behaviors. Social behavior is organized by social relationships. Insects may live in large colonies and have complex social relationships.
The answer is (A)

(question). What does not grow through cell division?
Options:
- (A) p53
- (B) AIDS
- (C) host
- (D) DDT
- (E) lung
- (F) HIV
- (G) corn
- (H) HPV
(answer). Populations of viruses do not grow through cell division because they are not cells. Where most viruses are DNA, HIV is an RNA virus. Populations of HIV do not grow through cell division because they are not cells.
The answer is (F)

(question). What organs do both fishes and reptiles have?
Options:
- (A) legs
- (B) they all walk on land
- (C) gills
- (D) the eyes
- (E) protected
- (F) brains
- (G) alveoli
- (H) vision
(answer). Fish have a centralized nervous system with a brain. Nervous A reptile has a brain and nervous system. Fishes and reptiles have brains.
The answer is (F)

(question). Energy that comes from body heat can help with
Options:
- (A) recovery
- (B) commuting
- (C) movement
- (D) cooling
- (E) strength
- (F) stay warm
- (G) health
- (H) motion
(answer).
Evaporation of sweat uses energy, and the energy comes from body heat. When sweat is evaporated into the air, it provides additional cooling. Cooling uses energy, and the energy comes from body heat.
The answer is (D)