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Under how many eons, the time period of ...

Under how many eons, the time period of earth up to the recent have been divided ?

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The time period of earth has divided into two eons: (a) Precambrian: The period before 545 millon years. (b) Phenerozoic: The period after that till recent.
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SANTRA PUBLICATION-EVOLUTION-Short Answer Type Question
  1. Briefly describe the coacervate model.

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  2. Name the periods in the paleozoic era (starting from recent) ?

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  3. Under how many eons, the time period of earth up to the recent have be...

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  4. What kind of flora and fauna was observed in the Jurassic period ?

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  5. Name the periods which are also known as : (a) Carboniferous (b) Devon...

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  6. What aree the important sources of evidence in favour of biological ev...

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  7. Mention two features of Archaeopteryx ?

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  8. What are trace fossils ?

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  9. What are pseudofossils ?

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  10. What are analogous organs ?

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  11. Give at least two evidences that support the recapitulation theory.

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  12. What does the Modern Synthetic theory proposes as the cause of evoluti...

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  13. Write an account to describe the atmosphere that prevailed on the eart...

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  14. Mention the possible steps that has led to the origin of life.

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  15. Write the reptilian and avian features of Archaeopteryx.

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  16. What are homologous organs ? Describe with examples.

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  17. Describe the Recapitulation theory with the help of flowchart.

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  18. How can it be stated that DNA is the molecular life ?

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  19. What according to Darwin, led to the origin of new species ?

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  20. Describe the microspore model as proposed by Fox.

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