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

参考答案:

C

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