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What is common to whale, seal and shark?

  • Seasonal migration

  • Thick subcutaneous fat

  • Convergent evolution

  • Convergent evolution


C.

Convergent evolution

Distantly related animals (as whale, seal and shark) inhabiting similar habitats often develop similarly morphological features that make them look similar. This is termed adaptive convergence or convergent evolution.

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When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed

  • divergent evolution

  • microevolution

  • co-evolution

  • co-evolution


Adaptive radiation refers to

  • adaptations due to geographical isolation

  • evolution of different species from a common ancestor

  • migration of members of a species to different geographical areas

  • migration of members of a species to different geographical areas


The finches of Galapagos islands provide an evidence in favour of

  • special creation

  • evolution due to mutation

  • retrogressive evolution

  • retrogressive evolution


Which one of the following statement is correct?

  • Stem cells are specialize cells

  • There is no evidence of the existence of gills during embryogensis of mammals

  • All plant and animal cells are totipotent

  • All plant and animal cells are totipotent


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