Antibodies are large, y-shaped proteins that recognize and bind to:
Options:
- (A) humans
- (B) A Greek letter
- (C) bones
- (D) the skin
- (E) animals
- (F) inorganic items
- (G) immunogens
- (H) water
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Let's think first: Antibodies are large, Y-shaped proteins that recognize and bind to antigens. ALL immunogens are antigens. Antibodies are large, Y-shaped proteins that recognize and bind to immunogens.... So the answer is [(G)]


One example of an annelid has how many hearts?
Options:
- (A) three
- (B) Five
- (C) white
- (D) warm
- (E) four
- (F) strong
- (G) long
- (H) small
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Let's think first: Annelids are worms such as the familiar earthworm. An earthworm has five hearts. An animal that has five hearts is an annelid.... So the answer is [(B)]


When game animals move elsewhere, what else does?
Options:
- (A) relocation
- (B) prey animals
- (C) predatory animals
- (D) migratory birds
- (E) An object is seen
- (F) migrants
- (G) refract or absorb.
- (H) barks and snarls
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Let's think first: Migration is a type of movement that changes population size. Predatory animals migrate with the game animals. As movement causes a change in game population size, predatory population size changes, too.... So the answer is [(C)]


What is necessary for a growing child?
Options:
- (A) four limbs
- (B) stamina
- (C) hydration
- (D) food
- (E) pets
- (F) minerals
- (G) plastics
- (H) a measuring stick
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Let's think first: Minerals are chemical elements that are essential for body processes. Children's bodies are in a developing process. Minerals are necessary for children's growths.... So the answer is [(F)]


What produces a diploid zygote?
Options:
- (A) salamanders
- (B) Plant reproduction
- (C) peachleaf willow
- (D) permineralization
- (E) sexual reproduction
- (F) Veins and arteries.
- (G) Chlorophyll
- (H) Most plants
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Let's think first: Fertilization of gametes produces a diploid zygote. Sexual reproduction requires formation of gametes, followed by fertilization. Sexual reproduction produces a diploid zygote.... So the answer is [(E)]


What crawls and is known to have a complex nervous system? 
Options:
- (A) fur seals
- (B) Insects.
- (C) mammals
- (D) animals
- (E) a fish
- (F) humans
- (G) bees
- (H) ducks
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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: Most invertebrates have a more complex nervous system. Insects are the most common invertebrates. Insects have a more complex nervous system.... So the answer is [(B)]