Origin and Evolution of Life Four and Seven Marks Questions

10th Standard EM

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Science

Time : 01:00:00 Hrs
Total Marks : 55
    5 x 4 = 20
  1. Why is Archaeopteryx considered to be a connecting link?

  2. Write a note on evidences from Morphology and Anatomy in favour of Evolution.

  3. Explain Use and Disuse theory.

  4. Two kittens (Leo and Joe) from the same mother were separated and sent to different habitual conditions. Leo was sent to a high mountain wild region and Joe was domesticated and lived in a city. After a good 5 years) it was found that Leo was aggressive and built strong with hunting skills. Leo looked tall with strong legs and muscled structure) whereas Joe was a well mannered cat looked puffy with soft legs.
    (i) Do you think habitual condition impact animal characters?
    (ii) What acquired characters does Leo inherit?
    (iii) Is it true but Leo's offspring would be a hunter?

  5. X is the oldest fossil bird. The animal X became extinct a long time ago. But the study of fossils of
    X tells us that it had features like birds and some like reptiles.
    (i) Identify 'X'?
    (ii) Name one feature in which 'X' resembled birds.
    (iii) Name one feature in which 'X' resembled reptiles.

  6. 5 x 7 = 35
  7. Natural selection is a driving force for evolution-How?

  8. How do you differentiate homologous organs from analogous organs?

  9. Arun was playing in the garden. Suddenly he saw a dragon fly sitting on a plant. He observed the wings of it. He thought it looked similar to a wing of a crow. Is he correct? Give reason for your answer.

  10. Imprints of fossils tell us about evolution-How?

  11. Octopus, cockroach and frog all have eyes. Can we group these animals together to establish a common evolutionary origin. Justify your answer.

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