本题目来源于试卷: Interaction & Interdependence C.3 Photosynthesis，类别为 IB生物学
[单选题]
Carbon dioxide enrichmev( qae)ym7p/d+ puzd /nt experiments are used to predict future rates oqh(sar5y8; z( 6z ow8uli 7uwsf photosynthesis and plant growth. Which of the following is an advantage of enclosed greenhouse experiments over free-air carbon dioxide experi7siwaw 8h (u6(q58 slzuy; rozments (FACE) experiments, when conducting carbon dioxide enrichment experiments?
A. The wavelength of light can be controlled
B. It mimics a natural ecosystem
C. Large trees can be studied
D. It is difficult to control rainfall
参考答案: A
本题详细解析:
A Enclosed greenhouse experiments allow for wavelengths of light to be controlled by exposing the plants to different colours of light. By adjusting the spectrum of light, researchers can investigate the isolated effects of distinct wavelengths on plant responses to elevated carbon dioxide levels. Such control is typically unattainable in open-air experiments like the free-air carbon dioxide enrichment (FACE) system, where natural light conditions predominate. Choice A is correct. Choice B is incorrect as an enclosed greenhouse space does not mimic a natural ecosystem as it is a man-made enclosed structure. Choice C is incorrect, as large trees cannot fit or grow freely in a greenhouse. Choice D is incorrect as in an enclosed greenhouse, water can be controlled, mimicking rainfall.
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