q: What are attached permanently?
Options:
- (A) Veins and arteries.
- (B) sensory neurons
- (C) barnacles
- (D) tadpoles
- (E) seahorses
- (F) alligators
- (G) adult sponges
- (H) an organism's body
a: (G)... Explanation: Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are attached permanently and cannot move. That's why the answer is (G).

q: What is one thing viruses do not cause?
Options:
- (A) disease
- (B) AIDS
- (C) illness
- (D) cancer
- (E) Ebola
- (F) fever
- (G) death
- (H) smallpox
a: (D)... Explanation: Populations of viruses do not grow through cell division because they are not cells. Cancer is unregulated cell division. Cancer is not caused by viruses. That's why the answer is (D).

q: Salt in the water is something that must be adapted to by organisms who live in:
Options:
- (A) evaporation
- (B) environment
- (C) rivers
- (D) bioaerosols
- (E) our planet
- (F) Deposition
- (G) estuaries
- (H) deserts
a: (G)... Explanation: Organisms that live in marine biomes must be adapted to the salt in the water. Estuaries display characteristics of both marine and freshwater biomes. Organisms that live in estuaries must be adapted to the salt in the water. That's why the answer is (G).

q: Endocrine hormones move from place to place through the
Options:
- (A) animals
- (B) ovaries
- (C) Man
- (D) humans
- (E) blood
- (F) hair
- (G) skin
- (H) scales
a:
(E)... Explanation: Endocrine hormones travel throughout the body in the blood. For the tourists, there are many places to travel. Endocrine hormones move from place to place in the body through the blood. That's why the answer is (E).