31. Among nonmammalian vertebrates, the cloaca is an anatomical structure that functions as A) a specialized sperm-transfer device produced only by males B) a shared pathway for the digestive, excretory, and reproductive systems C) a source of nutrients for developing sperm in the testes D) a gland that secretes mucus to lubricate the vaginal opening
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Which of the following best describes the cloaca in nonmammalian adult vertebrates? It is a shared pathway for the digestive, excretory, and reproductive systems. It is a source of nutrients for developing sperm in the testes. It is a specialized sperm-transfer device produced only by males. It is a gland that secretes mucus to lubricate the vaginal opening.
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In male mammals, excretory and reproductive systems share a. the vas deferens. b. the urethra. c. the seminal vesicle. d. the prostate.
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