How do squids reproduce?
Options:
- (A) while flying
- (B) seeds
- (C) split in two
- (D) electrically
- (E) sexually
- (F) asexually
- (G) movement
- (H) fertile
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Let's think first: Mollusks reproduce sexually. Interestingly, a squid is also a mollusk. Squids reproduce sexually.... So the answer is [(E)]
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What stimulates the reproductive organs to develop into male organs?
Options:
- (A) Something coming from a gland
- (B) Chemical energy
- (C) A compound that donates proton
- (D) certain anabolic hormones
- (E) Something made from fermented ricce
- (F) Electrical energy
- (G) heat produced
- (H) sensory neurons
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Let's think first: Testosterone stimulates the reproductive organs to develop into male organs. Examples of anabolic hormones are testosterone and nandrolone. Certain anabolic hormones stimulate the reproductive organs to develop into male organs.... So the answer is [(D)]
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What is a basis for natural selection?
Options:
- (A) fur and fat
- (B) competition
- (C) mutation
- (D) root growth
- (E) insects
- (F) animals
- (G) trees
- (H) cows
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Let's think first: Mutation creates new genetic variation in a gene pool. Genetic variation is the basis for natural selection. Mutation is a basis for natural selection.... So the answer is [(C)]
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Most ecosystems need what?
Options:
- (A) invasive species
- (B) water
- (C) insects
- (D) food
- (E) tornadoes
- (F) recycling
- (G) plants
- (H) scientists
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Let's think first: Most ecosystems get energy from sunlight. Sunlight is turned into energy by plants. Most ecosystems need plants.... So the answer is [(G)]
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