How can animals with six legs detect sound?
Options:
- (A) thorax
- (B) Refract it
- (C) electricity
- (D) they bend
- (E) wings
- (F) environment
- (G) pupils
- (H) antennae
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Let's think first: Some insects can use their antennae to detect sound. Every insect has six legs, that's an insect. Animals with six legs can use their antennae to detect sound.... So the answer is [(H)]

What can happen to a population when animals begin to migrate?
Options:
- (A) It expands
- (B) harm them
- (C) it can change species
- (D) Move to another area
- (E) it can eat more
- (F) it can go extinct
- (G) it can fluctuate
- (H) Plant growth is reduced
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Let's think first: Migration is a type of movement that changes population size. Population viability Population sizes are under constant fluctuation. Migration is a type of movement that causes a population to fluctuate.... So the answer is [(G)]

Which is higher on the food chain?
Options:
- (A) insects
- (B) animals
- (C) humans
- (D) glucose
- (E) decomposers
- (F) herbivores
- (G) producers
- (H) consumers
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Let's think first: Consumers take in food by eating producers or other living things. Decomposers produce nutrients for producers. Decomposers make nutrients for organisms that become food for consumers.... So the answer is [(H)]

What is just one of many ways that pugs learn how to behave.
Options:
- (A) humans
- (B) playing
- (C) sleeping
- (D) growing
- (E) Movement
- (F) sound
- (G) genetics
- (H) exercise
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Let's think first: Playing is just one of many ways that mammals and other animals learn how to behave. Pugs are mammals and mammals shed. Playing is just one of many ways that pugs learn how to behave.... So the answer is [(B)]

In their quest for reproduction, salamanders are assisted by their what?
Options:
- (A) animals
- (B) kinetic energy
- (C) sense of irony
- (D) taste in clothing
- (E) fur and fat
- (F) sense of smell
- (G) chameleon
- (H) insects
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Let's think first: Most salamanders use their sense of smell to find a mate. Food to survive, mates to reproduce, and water to drink. To reproduce, salamanders are assisted by their sense of smell.... So the answer is [(F)]

Prokaryotes lack regions that do not code for proteins, while this type of living being has them:
Options:
- (A) bioaerosols
- (B) layers of fat
- (C) orchids
- (D) animals
- (E) critical organs
- (F) sensory neurons
- (G) eukaryotes
- (H) it needs them
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Let's think first: Introns are regions that do not code for proteins. Prokaryotes lack introns, whereas eukaryotes contain introns. Prokaryotes lack regions that do not code for proteins, while eukaryotes do have them.... So the answer is [(G)]