49. 右下圖為田鼠在 1990 到 2010 年間的族群數量變化情形。依據此圖，請問下列關於其族群數量變化的敘述，何者最不合理？ (A) 此族群的數量變動，在 1996、2002、2009 年，可能
50. 血清張力素 (serotonin) 可能是睡眠中心神經元的主要神經傳遞物質，所以睡前喝牛奶有鎮定、催眠的作用，是因牛奶中富含何種合成血清張力素所必需之胺基酸？(A) 組織胺酸 (histidi
2. Which of the following is a protein synthesized at specific times during the cell cycle that asso
3. The hormone primarily responsible for setting the basal metabolic rate and for promoting the matu
4. Which of the following cells of the pancreas secrete insulin?(A) exocrine cells (B) alpha cells (
7. The blastopore denotes the presence of an endoderm-lined cavity in the developing embryo, a cavit
8. What type of specialized junction connects epithelial cells lining the renal tubules?(A) tight ju
9. In both males and females, gonadotropin secretion by the anterior pituitary is stimulated by(A) G
10. The corpus luteum is maintained for the first 10 weeks of pregnancy by(A) progesterone. (B) estr
11. Which of the following is an autoimmune disease in which myelinated neurons become the target of
13. Glucose diffuses slowly through artificial phospholipid bilayers. The cells lining the small int
14. The structure of a protein that contains two or more polypeptides is the(A) primary structure. (
15. A man with Klinefelter syndrome (47, XXY) is expected to have any of the following except:(A) lo
16. Ketoacidosis in untreated diabetes mellitus is due to(A) excessive fat catabolism. (B) hypoventi
17. If humans have 2,900 Mb, a specific member of the lily family has 120,000 Mb, and a yeast has ~1
18. Drinking alcohol makes you urinate more frequently because(A) alcohol contains caffeine.(B) alco
20. Which kind of metabolic poison would most directly interfere with glycolysis?(A) an agent that r