_carry signals that control sexual development and reproduction
Options:
- (A) sex hormones
- (B) electricity
- (C) nucleic acid
- (D) Most plants
- (E) animals
- (F) genes
- (G) dendrites
- (H) photons
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Let's think first: Sex hormones are chemical messengers that control sexual development and reproduction. Chemical messengers carry signals from one nerve branch to another. Sex hormones carry signals that control sexual development and reproduction.... So the answer is [(A)]
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What does the organ of the eye sense?
Options:
- (A) Gluons
- (B) Photons
- (C) Neutrons
- (D) Energy
- (E) heat
- (F) distance
- (G) sunlight
- (H) Sound waves
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Let's think first: Sight is the ability to sense light, and the eye is the organ that senses light. Light is made of photons . The eye is an organ that can sense photons.... So the answer is [(B)]
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What does the fishhook cactus release during the day but not during the night.
Options:
- (A) heat
- (B) Air
- (C) water
- (D) carbon monoxide
- (E) carbon dioxide
- (F) oxygen
- (G) Energy.
- (H) Energy
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Let's think first: Plants release oxygen during the day but not during the night. Another kind of plant is the fishhook cactus. The fishhook cactus releases oxygen during the day but not during the night.... So the answer is [(F)]
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Which has specialized reproductive organs?
Options:
- (A) Clouds
- (B) Conifers
- (C) River
- (D) peachleaf willow
- (E) Venus flytrap
- (F) animals
- (G) mammals
- (H) Mountain
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Let's think first: Plants have specialized reproductive organs. Most people know that the Venus Flytrap is a carnivorous plant. The Venus Flytrap has specialized reproductive organs.... So the answer is [(E)]
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