本题目来源于试卷: Form and Function B.6 Gas Exchange，类别为 IB生物学
[单选题]
Which of the followin() qwolr m)o r5- ojsv e,d7,+xwl1elcg substances typically moa.1 l8 7*si cjnxbqqd7ves either in or out of a leaf's inner air spacenqal*bi 1j xc7 q7.sd8 via stomata?
I. Water
II. Oxygen
III. Mineral ions
A. I only
B. III only
C. I and II
D. I, II and III
参考答案: C
本题详细解析:
Water diffuses out of stomata from the inner air space of leaves during transpiration (Option I). Because oxygen is produced during photosynthesis, its concentration is generally higher in the inner air space than the atmosphere which means it diffuses out through the stomata (Option II). Mineral ions (Option III) enter plants through root cells, not through the stomata.
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