1.Which of the following is TRUE of the mammalian digestive system? a. All foods beginhteir enzymatic digestion in the mouth. b. After leaving the oral cavity,the bolus enters the larynx. c. The epiglottis prenvents food from entering the esophagus. d. Enzymatic digestion continues in the esophagus. e. The trachea leads to the esophagus and then to the stomach. 答案是C..我覺得B好像可以說..食團離開口腔以後進入喉頭..(應該是這樣吧..) 那就是說pharynx 跟 larynx是兩個不同的地方摟?? 哪裡不同呢??我是覺得很難分清楚..||-_- 2.Which of the following is NOT required for internal fertilization? a. copulatory organ b. sperm receptacle c. behavioral interaction d. internal development of embryo e. All of the above are necessary for internal fertilization. 答案是..D.. 不過這題有一半是我英文不好>"<.. B是儲存精子的地方嗎??體內跟體外授精的都有吧?? C我就看不太懂了.. D是體內成長的胚胎...體外授精也有需要體內成長胚的動物嗎?? 所以我對這個答案也不是很了解.. 謝謝各位的回答<(_ _)> --

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