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Evolution — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution2 Marks
Question
Select the analogous structures from the combinations given below:
  1. Forelimbs of whales and bats
  2. Eyes of octopus and mammals
  3. Tuber of sweet potato and potato
  4. Thorns of Bougainvillea and tendrils of Cucurbita
  1. ​​​​​​​State the kind of evolution they represent.
✓

Answer

  1. Analogous organs or structures are those that are similar in function but different in origin.
From the given options, following are the analogous structures:
  • Eyes of octopus and mammals perform the same basic visual function but they differ in the origin of their retina.
  • Tubers of sweet potato and potato perform the same function of food storage but they are modifications of root and stem, respectively.
  1. The kind of evolution represented by analogous organs or structures is convergent evolution as they have different origins but evolve similar traits with evolution to perform the same function.

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