Eyespots, the most rudimentary eyes,
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Eyespots, the most rudimentary eyes, are found in protozoan原生动物 flagellates 鞭毛虫 , flatworms 扁形虫 , and segmented worms片段 蠕虫 .
- A.hostile-looking
- B.perceptive
- C. primitive
- D.strangely formed
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