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Which of the following is an example of the homologous organs?
(a)All of the above.
(b)Our arm and a dog's fore-leg.
(c)Potato and runners of grass.
(d)Our teeth and an elephant's tusks.

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Important Questions on Diversity in Living Organisms
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Torpedo, Sting ray, Dog fish, Rohu, Angler fish, Exocoetus.

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(a) The place where they live.
(b) The kind of cells they are made of why?

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Biological classification is a dynamic and ever-evolving phenomenon. Justify with two examples.

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