What do mussels eat?
Options:
- (A) bivalves
- (B) sub-units of species
- (C) Something coming from a gland
- (D) mussels
- (E) plankton and nonliving organic
- (F) Something made from fermented ricce
- (G) mollusks
- (H) Microscopic organisms
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Let's think first: Bivalves feed on plankton and nonliving organic matter. Mussels are bivalve mollusks. Mussels eat plankton and nonliving organic matter.... So the answer is [(E)]


What is required before a chemical change?
Options:
- (A) kinetic energy
- (B) energy usage
- (C) activation push
- (D) activation energy
- (E) activation switch
- (F) activation power
- (G) Burning fuel and air
- (H) Evaporation
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Let's think first: All chemical reactions require activation energy to get started. Chemical changes are a result of chemical reactions. Activation energy must be used before a chemical change happens.... So the answer is [(D)]


What ccurs when many muscles contract a little bit all at once?
Options:
- (A) heat production
- (B) heat loss
- (C) sweating
- (D) permineralization
- (E) hypothermia
- (F) resistance
- (G) cramping
- (H) heat energy
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Let's think first: Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production occurs when many muscles contract a little bit all at once.... So the answer is [(A)]


What has good eyesight?
Options:
- (A) humans
- (B) fur seals
- (C) athletes
- (D) bears
- (E) goats
- (F) geckos
- (G) elephants
- (H) rabbit
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Let's think first: Most reptiles have good eyesight and a keen sense of smell. Geckos are, in fact, reptiles. Geckos have good eyesight.... So the answer is [(F)]


What is the result of a dolphin keeping a high metabolism rate?
Options:
- (A) generate blood cells
- (B) generate heat
- (C) overheating
- (D) develop cancer
- (E) kinetic energy
- (F) aerobic capacity
- (G) exercise
- (H) Energy.
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Let's think first: Mammals generate heat mainly by keeping their metabolic rate high. All dolphins are mammals and all mammals breathe air. Dolphins generate heat by keeping their metabolic rate high.... So the answer is [(B)]


Animals are _ things.
Options:
- (A) insects
- (B) invisible
- (C) edible
- (D) impossible
- (E) protected
- (F) sparkly
- (G) living
- (H) an object
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think first: Animals adapt to cold temperatures. Adaptation living things adapt to their environment. Animals are living things.... So the answer is [(G)]