_ is how organisms grow and repair themselves.
Options:
- (A) complex
- (B) recycling
- (C) properties
- (D) fusion
- (E) fission
- (F) bacteria
- (G) Mitosis
- (H) potatoes
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Let's think first: Cell division is how organisms grow and repair themselves. Mitosis is cell division. Mitosis is how organisms grown and repair themselves.... So the answer is [(G)]
What can polar bears do to generate heat?
Options:
- (A) make fire
- (B) eat ice
- (C) stay warm
- (D) nothing
- (E) fur
- (F) motors
- (G) shiver
- (H) sweating
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Let's think first: Mammals can also generate little bursts of heat by shivering. Polar bears are mammals. Polar bears can generate heat by shivering.... So the answer is [(G)]
Where are roundworms useful in an ecosystem?
Options:
- (A) killing animals
- (B) soils
- (C) fields
- (D) bacteria
- (E) eating plants
- (F) wetland
- (G) food
- (H) alveoli
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Let's think first: Roundworms make up the phylum Nematoda. Also, nematoda and rotifera are important groups contributing to soils. Roundworms make important contributions to soils.... So the answer is [(B)]
Roots, stems and leaves continue to do what throughout their lives?
Options:
- (A) die
- (B) edible
- (C) expand
- (D) grow
- (E) growth
- (F) spread
- (G) live
- (H) propagate
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Let's think first: Most plants continue to grow throughout their lives. All seed plants have roots, a stem, and leaves. Roots, stems and leaves continue to grow throughout their lives.... So the answer is [(D)]
Where do leeches live in relation to their hosts?
Options:
- (A) In their beds
- (B) body water
- (C) competing for resources
- (D) In their shoes
- (E) loose soil
- (F) In their intestines
- (G) important habitats
- (H) On their surface
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Let's think first: Some parasites live on the surface of their host. Leeches are external parasites. Leeches live on the surface of their hosts.... So the answer is [(H)]
What do trees release during the day but not at night?
Options:
- (A) Energy
- (B) water
- (C) He
- (D) Ce
- (E) chemicals
- (F) Energy.
- (G) heat
- (H) oxygen
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Let's think first: Plants release oxygen during the day but not during the night. All plants are trees. Trees release oxygen during the day but not at night.... So the answer is [(H)]