本题目来源于试卷: IB ESS Unit 2: Ecosystems & Ecology，类别为 IB环境系统与社会
[单选题]
Figure: A quadrat in a field s+dq ;a)(pewe:f ob,l8cf ec y0+f8fy ;fw 1nw(fgvl+
The Figure shows a field with small yellow and medium blue flowers, as well as some four-leaf clover.
Calculate the percentage frequency of the small yellow flowers.
A. 15%
B. 17%
C. 19%
D. 32%
参考答案: A
本题详细解析:
Fifteen of the squares in the quadrat have on;*2put 7bap.4o-m ey,v f smldcy,b w)e or two small yellow flowers in them. There are u,-p, 7bcb twf edyvo24*a;pys) ml m.100 squares in total. Thus, option A is correct.
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