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 enzmkg7jgeh 6 brt184u, bymes that catalyse different cw w3+ c0s4flhy2(xcy3 c/shc ehemical reactions taking place in the cytoplasm. What function of life is demonstrated in this situaywe+c3/cs3 (f4 hsc0 lwx y2hction?
A. Excretion
B. Homeostasis
C. Reproduction
D. Metabolism
参考答案: D
本题详细解析:
Choice A - Excretion is the proco g/+ p -f*ckrxr33xd)ur,pqd vqi 7*ph)iji 7ess wherein waste and excess water in the organism are removed. Paramecia expel waste products such adxgpp)r f3jodx,r-*h7i +ivpi3q *kc rq / 7u)s 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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