What animal can regrow middle segments when broken?
Options:
- (A) amoeba
- (B) geckos
- (C) humans
- (D) insects
- (E) Wasps
- (F) worms
- (G) toads
- (H) snakes
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Let's think first: Annelids have the amazing capacity to regrow segments that break off. Annelids include earthworms and leeches. Earthworms have the ability to regrow segments that break off.... So the answer is [(F)]
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What lacks respiratory and excretory systems?
Options:
- (A) the Sun
- (B) insects
- (C) starfish
- (D) barnacles
- (E) ferns
- (F) water
- (G) Conifers
- (H) humans
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Let's think first: Echinoderms lack respiratory and excretory systems. Echinoderms are represented by the starfish. Starfish lack respiratory and excretory systems.... So the answer is [(C)]
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Molecules of trna and amino acids are assembled where?
Options:
- (A) nucleoli
- (B) A computer
- (C) Cooking
- (D) Most plants
- (E) boiling
- (F) animals
- (G) Power plants
- (H) retina
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Let's think first: Molecules of tRNA bring amino acids to the ribosome in the correct sequence. Ribosomes are assembled in the nucleoli. Molecules of tRNA and amino acids are assembled in the nucleoli.... So the answer is [(A)]
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Biomes that have suffered mainly from pollution have water that contains little or no what?
Options:
- (A) Toxins
- (B) CO 2
- (C) liquid
- (D) salt
- (E) Lead
- (F) Carbon
- (G) Acids
- (H) sulfur
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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: Freshwater biomes have water that contains little or no salt. Freshwater biomes have suffered mainly from pollution. Biomes that have suffered mainly from pollution have water that contains little or no salt.... So the answer is [(D)]
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