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In the solar system of the milky way gal...

In the solar system of the milky way galaxy, earth was supposed to have been formed about…… billion years back

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The correct Answer is:
4.5 Billion years back
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Read the following statements regarding evolution (A-D)- A. Whales, bats, cheetah, and humans (all mammals) share similarities in the pattern of bones of forelimbs. B. The diversity of life forms on earth has been changing over millions of years. C. About 65 million years ago the dinosaurs suddenly disappeared from the earth. D. A single-step large mutation is called speciation and explained by Herbert Spencer. How many statements from the above is/are correct ?

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A small ball is projected at an angle alpha with an initial velocity u between two vertical walls such that in the absence of the wall its range would have been 5d . Given that all the collisions are perfectly elastic and distance between the walls be d/2 , find. (a) maximum height atained by the ball. (b) total number of collisions with the walls before the ball comes back to the ground, and (c) point at which the ball finally falls. The walls are supposed to be very tall.

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ALLEN-EVOLUTION -Question
  1. In the solar system of the milky way galaxy, earth was supposed to hav...

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  2. Name the scientist who disproved spontaneous generation theory.

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  3. Name the common ancestor of the great apes and man.

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  4. Name any two vertebrate body parts that are homologous to human foreli...

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  5. Attempt giving a clear definition of the term species

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  6. Read the following statements carefully and select the correct ones. ...

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  7. Which was the bigges land dinosaur?

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  8. what is 'saltation' according to de Vries ?

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  9. Stellar distances are measured in……..

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  10. Identify the examples of convergent evolution from the following: (i...

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  11. Write the definition of evolutionary Biology?

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  12. State the theory of Biogenesis.

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  13. Can we call human evolution as an adaptive radiation? Explain.

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  14. Describe one example of adaptive radiation.

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  15. Why artificial selection is done?

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  16. What are the fossils and where are they found?

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  17. Write the name of any four factors which affect Hardy-Weinberg equilib...

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  18. What is founder effect ?

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  19. Write the differences between Darwinian variations and deVries mutatio...

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  20. Write the name of gaseous mixture taken by Miller in his experiment. A...

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  21. Explain with the help of an example the type of evolution homology is ...

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