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Class 10 Class 12

What is common to whale, seal and shark?

• Seasonal migration

• Thick subcutaneous fat

• Convergent evolution

• Homeothermy

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.

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.

Arrange the following substances in a proper sequence with regard to the formation of chemical constituents at the time of origin of life :

Sugar, methane, nucleic acid and amino acid.

Methane—sugar—amino acid—nucleic acid.

Give another name for origin of life from non living matter.

Abiogenesis

What conditions were created by Miller in his experiment?

Miller  created electric discharge in a closed flask that contained CH4, NH3, H2 and water vapour at high temperature like 800$°\mathrm{C}$

When did life appear on earth ?

500 million years ago.

What is the phenomenon called when the original drifted population becomes founders?

Founder Effect.

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