Question

Octopus, cockroach and frog all have eyes. Can we group these animals together to establish a common evolutionary origin. Justify your answer
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Answer 1

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• Octopus, cockroach and frog all have eyes.

• Octopus-belongs to mollusc which have simple eye without lens.

• Cockroach are invertebrate have compound eyes.

• Frog which is vertebrate, have highly specialised lens.

• However, all of them perform the same function that is vision.

• Thus a common evolutionary origin can be established on the basis of eye.

Answer 2

Answer:

The octopus, cockroach, and frog cannot be grouped together because the development of the eye is not a characteristic point used in the classification of evolution. Though the function of the eyes for the octopus, cockroach, and frog are the same their structure and mode of development vary. As the development of the eye is not a characteristic point used in the classification of evolution so these animals cannot be grouped together.