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 prokx lq+3u4fsoroo s19x5 v(05bzcp grrkn6 ( /icaryotes that can perform photosynthesis. Which structural feature is common to kc/ v nrgz56((ibpr0cboth cyanobacteria and plant 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 earlij+ay6 j+)y. v, ypp:tlcfr6p sest organisms to have evolved the process 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)s rjlvj , .6p+:6yfpt+pycy)a are 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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