What helps producers make food?
Options:
- (A) Decomposition.
- (B) heat energy
- (C) honeybees
- (D) Chemical energy
- (E) Electrical energy
- (F) animals
- (G) an electric stove
- (H) Power plants
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Let's think first: Producers make food from inorganic molecules. Decomposition is the breakdown of organic molecules into inorganic molecules. Decomposition helps producers make food.... So the answer is [(A)]

What occurs when the tension of cell walls are eased?
Options:
- (A) Sleep
- (B) exercise
- (C) friction
- (D) Exfoliation
- (E) recovery
- (F) dilation
- (G) sweating
- (H) murmur
--
Let's think first: Dilation occurs when cell walls relax. Relaxation promotes relaxation and easing of tension. Dilation occurs when the tension of cell walls are eased.... So the answer is [(F)]

What is one thing fish cannot make?
Options:
- (A) babies
- (B) nests
- (C) matter
- (D) fat
- (E) edible
- (F) Energy
- (G) bubbles
- (H) food
--
Let's think first: Heterotrophs are living things that cannot make their own food. All fish are heterotrophic. Fish cannot make their own food.... So the answer is [(H)]

Amphibians have what sort of sensing system?
Options:
- (A) strong
- (B) retina
- (C) four limbs
- (D) chemical
- (E) mechanical
- (F) the eyes
- (G) nerves
- (H) heat or cold
--
Let's think first: Amphibians have sense organs to smell and taste chemicals. Smell and taste belong to our chemical sensing system. Amphibians have a chemical sensing system.... So the answer is [(D)]

Some viruses can what?
Options:
- (A) fret
- (B) harm
- (C) damage
- (D) grow
- (E) expand
- (F) discover
- (G) visit
- (H) kill
--
Let's think first: Some viruses can cause cancer. Skin cancer can kill. Some viruses can kill.... So the answer is [(H)]

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
--
Let's think first: Fish have a centralized nervous system with a brain. Nervous A reptile has a brain and nervous system. Fishes and reptiles have brains.... So the answer is [(F)]