xii. Please provide complete correct solution. Preferentially done by hand or on

Question

xii. Please provide complete correct solution. Preferentially done by hand or on paper. 49. Which of the following embryos shows the most dramatic form of meroblastic cleavage? a. Sea urchin. b. Frog. c. Chicken. d. Human. 50. In amniotes, which extraembryonic membrane disposes of nitrogenous wastes? a. Amnion. b. Chorion. c. Allantois. d. Yolk sac. 51. Which of the following, if any, is an example of positive feedback? Select E if none are examples. a. b. c. d. e. Estrogen and progesterone (luteal phase) An action potential. Resting membrane potential. Testosterone feedback on the hypothalamus None of the above are examples of positive feedback. 52. Which of the following, if any, is an example of an animal with a gastrovascular cavity? Select E if none are examples. a. b. c. d. e. Earthworm Hydra Nematode (round worm) Humans None of the above organisms have a gastrovascular cavity

Explanation / Answer

49. Sea Urchin

50. Allantois

51. An Action potential

52. Hydra

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