Chain-of-thought: Echinoderms have a unique water vascular system with tube feet. Each starfish arm is lined with tube feet. Each starfish arm contains part of the water vascular system.
Q: Where does a starfish have its water vascular system?
Options:
- (A) salt and water.
- (B) Chlorophyll
- (C) the environment
- (D) in its arms
- (E) on the rocks
- (F) in its eyes
- (G) Epidermis
- (H) in the ocean
A: (D)
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Chain-of-thought: Glucose is used for energy by the cells of most organisms. Food is converted into glucose. Food is used for energy by most organisms.
Q: What uses food for energy?
Options:
- (A) Most plants
- (B) no organisms
- (C) agriculture
- (D) the Moon
- (E) animals
- (F) athletes
- (G) most organisms
- (H) the Sun
A: (G)
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Chain-of-thought: Electron transport is the final stage of aerobic respiration. Aerobic respiration occurs only in the presence of oxygen. Electron transport occurs only in the presence of oxygen.
Q: Electron transport requires which of the following?
Options:
- (A) electron microscope
- (B) sodium
- (C) Energy.
- (D) Oxygen
- (E) fission
- (F) warmth
- (G) flagellum
- (H) Energy
A: (D)
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