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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.


B.

Cryptic camouflage is seen in Biston betularia

The peppered moth (Biston betularia) is a temperate species of night-flying moth. Peppered moth evolution is often used by educators as an example of natural selection. Peppered moths are cryptically camouflaged against their backgrounds when they rest on the tree trunk.


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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.

(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?


Convergent Evolution' is shown by

  • homologous organs

  • analogous organs

  • vestigial organs

  • all of the above


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