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Expression of IdeasEasy–MediumEmphasising a similarity between two eyes

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - The octopus eye and the human eye each have a lens, an iris and a retina. - The two kinds of eye evolved independently. - The octopus eye has no blind spot. - The human eye has a blind spot where the optic nerve leaves the retina.

The student wants to emphasise a similarity between the octopus eye and the human eye. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Although they evolved independently, the octopus eye and the human eye share the same basic parts: a lens, an iris and a retina.Correct
  2. B. The octopus eye has no blind spot.
  3. C. The octopus eye and the human eye evolved independently.
  4. D. Unlike the human eye, the octopus eye has no lens.

Answer: A. Although they evolved independently, the octopus eye and the human eye share the same basic parts: a lens, an iris and a retina.

Shared parts, stated as shared — choice A is the similarity.

Why the other answers are wrong

B. The octopus eye has no blind spot.
This is a difference, not a similarity.
C. The octopus eye and the human eye evolved independently.
Independent evolution is the setup, not the shared feature.
D. Unlike the human eye, the octopus eye has no lens.
The notes say both eyes have a lens.

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