What is sequence in the evolution of man ?

Fish- amphibian- bird- man

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Insect- fish- bird- man

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Fish- amphibian- reptile- man

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Amphibian- bird- man- bird

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Solution

The correct option is C Fish- amphibian- reptile- man
Evolution leads to changes in the characteristics of a living organism according to the changing environmental conditions with time. This change creates variations which are inherited from one generation to the other. The modification leads to shifting of simpler structures into complex structures due to evolutionary changes and helps to adapt in harsh conditions. For example two-chambered heart of fishes turned to three chambered in amphibians and three to four chamber in reptiles which ends on completely modified four-chambered heart in man.
So, the correct answer is option C.

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What is the most important characteristic feature of birds when compared to fishes, amphibians and reptiles?

\begin{matrix} (i) A m p h i b i a n s a n d m o s t r e p t i l e s & A . 2 - c h a m b e r e d h e a r t (i i) B i r d s a n d m a m m a l s & B . 3 - c h a m b e r e d h e a r t (i i i) F i s h & C . 4 - c h a m b e r e d h e a r t \end{matrix}

\begin{matrix} (i) A m p h i b i a n s a n d m o s t r e p t i l e s & A . 2 - c h a m b e r e d h e a r t (i i) B i r d s a n d m a m m a l s & B . 3 - c h a m b e r e d h e a r t (i i i) F i s h & C .4 - c h a m b e r e d h e a r t \end{matrix}

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