Countercurrent exchange allows A) blood to be fully oxygenated as the water flow

Question

Countercurrent exchange allows A) blood to be fully oxygenated as the water flows across the gills of a fish. B) gas exchange as blood in the dorsal vessel of an insect is pushed out to the air filled. C) heat transfer from the supplying artery to the returning vein in the fluke of a dolphin, thereby conserving heat and metabolic energy. D) for the flow of water across the skin of a frog to oxygenate blood within its veins. E) Two of the above are correct. An ectothermal animal that has few or no options when it comes to behaviorally modifying its body temperature is ____. A) terrestrial lizard B) a sea anemone or other marine invertebrate C) a dog D) a humming bird What does the difference in temperature between arteries and veins indicate about a Canadian Goose standing on snow? A) The legs need to be kept cool so that the muscles will function well. B) The feet need to be kept near the same temperature as the abdomen so they do not freeze in water. C) Temperature is always colder in the abdomen. D) Minimizing the temperature difference between the foot and abdomen means the goose conserves much of its body heat. E) The gooses foot functions fine no matter the temperature. Mark the letter of the best matching answer. Note that numbered questions may only be matched to lettered answers directly above. Dashed lines are meant to isolate questions with suitable answers. A) oviduct B) clitoris C) cervix The junction of the uterus and upper vagina

Explanation / Answer

1.C

2.B invertibrates,fishes and ambhibians are the examples

3.D:it conserves much of its body heat.

4.C:cervix

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