Ans: (F)
Question: What is important for the chemical equilibrium of the body?
Options:
- (A) sleep
- (B) exercise
- (C) hydration
- (D) dish soap
- (E) eyesight
- (F) hormones
- (G) detergent
- (H) glucose
CoT: Hormones control many cell activities, so they are very important for homeostasis. Homeostasis is the chemical equilibrium of the body. Hormones are very important for the chemical equilibrium of the body.

Ans: (F)
Question: Zooplankton are tiny animals that feed on what?
Options:
- (A) sunlight
- (B) vegetation
- (C) Energy
- (D) loose soil
- (E) plant life
- (F) diatoms
- (G) fungi
- (H) chemicals
CoT: Zooplankton are tiny animals that feed on phytoplankton. Diatoms are the predominant phytoplankton. Zooplankton are tiny animals that feed on diatoms.

Ans: (H)
Question: Many corals secrete what to form a coral reef?
Options:
- (A) Chlorophyll
- (B) salt and water.
- (C) The area was once underwater
- (D) Chemical energy
- (E) aqueous solution
- (F) Organic compounds
- (G) gastropod shells
- (H) hard outer covering
CoT: Many corals secrete an exoskeleton that builds up to become a coral reef. An insect has a hard outer covering called an exoskeleton. Many corals secrete a hard outer covering that builds up to become a coral reef.