本题目来源于试卷: Unity and Diversity A.4 Cell Structure，类别为 IB生物学
[单选题]
Paramecium produces eza l jh5 x9sq5f u:;*sb0j kglwnw;+ ).sfk3icnzymes that c:ykxu0fwh:x .atalyse different chemical reactions taking place in the cytoplasm. What fwh uk. :0fx:yxunction of life is demonstrated in this situation?
A. Excretion
B. Homeostasis
C. Reproduction
D. Metabolism
参考答案: D
本题详细解析:
Choice A - Excretion is the process iu l6 ty1 y8xp86upm0ilx7l)hwherein waste and excess water in the organism are removed. Paramecia expel waste products syph70itml lyx8p16) 6lxiu8 uuch as carbon dioxide through the process of diffusion.
Choice B - Homeostasis pertains to the ability of living things to maintain a stable internal environment. Paramecia maintain a stable internal condition by expelling excess water using the contractile vacuole.
Choice C - Reproduction is the biological process by which organisms produce offspring that are biologically similar to themselves. Paramecia can reproduce sexually through meiosis and asexually through mitosis.
Choice D - Metabolism refers to all the chemical reactions in organisms such as anabolic and catabolic reactions. Paramecia produce enzymes that catalyse different catabolic and anabolic reactions in the cell.
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