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]
Cyanobacteria are prokaryotes that caq i **a,2)b pzd3z v/ghgzd 2z5bod1kjn perform photosyz0u*im*cwh - onxc-y:nthesis. Which structural feature is common to both cyanobacteria and plan:mowzxuh-*y* c n0ic -t cells?
A. Chloroplast
B. Cell wall
C. Pili
D. Mitochondria
参考答案: B
本题详细解析:
Prokaryotes are one of the earliest organisms to have evolved the processc5ze+bsk1 r.cn,i -k y of photosynthesis. Plant cells are eukaryotes that can also perform photosynthesis, but they evolved after prokaryotes. Some of the features that distinguish prokaryotes from plant cells (which are eukaryotes) are- r,5+ciz .nkseck yb1 membrane-bound organelles such as chloroplasts (Choice A) and mitochondria (Choice D) which are present in plant cells but absent in prokaryotes. According to the endosymbiotic theory, cyanobacteria evolved into chloroplasts during the early evolutionary process of eukaryotic cells.
Pili are found in prokaryotes but not in plant cells (Choice C). Even though the composition of the cell wall in prokaryotes is different (made of a peptidoglycan polymer) from the cell wall in plant cells (made up of cellulose), the presence of the cell wall is a common feature found in both prokaryotes and plant cells (Choice B).
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