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Convergent Evolution' is shown by

  • homologous organs

  • analogous organs

  • vestigial organs

  • all of the above


B.

analogous organs

Convergent evolution or adaptive convergence or parallel evolution is shown by analogous organs, whereas divergent evolution or evolutionary divergence or adaptive radiation are shown by homologous organs.


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(a) Name the primates that lived about 15 million years ago. List their characteristic features.

(b) (i) Where was the first man-like animal found?

(ii) Write the order in which Neanderthals, Homo habilis and Homo erectusappeared on earth.

State the brain capacity of each one of them.

(iii) When did modern Homo sapiens appear on this planet?


Analogous structures are a result of

  • convergent evolution

  • shared ancestry

  • stabilising selection

  • stabilising selection


Explain the salient features of Hugo de Vries theory of mutation. How is Darwin theory of natural selection different from it? Explain.

Which of the following statements is correct

  • Lion and leopard show convergent evolution.

  • Cryptic camouflage is seen in Biston betularia

  • Natural selection is responsible for extinction of dinosaurs.

  • Homo habilis and Homo erectus are closely related.


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