本题目来源于试卷: Unity and Diversity A.6 Diversity of Organisms，类别为 IB生物学
[单选题]
Which of the following woufe*xe;qhq3rjlm uf +k*x4/e:ld provide evidence for two individuals b: cg5pb5vt /zjc4teo ,elonging to different spec 5,cecj/ vtzo4bt5:pgies?
I. Differences in genome base sequence
II. Differences in genome size
III. Differences in chromosome number
A. III only
B. I and II only
C. II and III only
D. I, II and III
参考答案: A
本题详细解析:
Choice A is correct because only statement III is evidence of organism1h /jeuxt7xm3 s being different species. Organisms of the same species will normally have the same number of chromosomes, except in the case of some genetic conditions such as Down syndrome in humans. So organ3mux1/ 7xhe tjisms having different numbers of chromosomes is evidence for them being separate species. Statements I and II can both vary within a species due to mutations.
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