Olympiad – Class X – Science - Bio - Heredity and Evolution

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Question - 1

What is organic evolution?

  • A Formation of more and more complex organisms from simpler ones through gradual changes.
  • B The act of special creation that brought all the organisms into this world.
  • C Life started from non-living matter in one day.
  • D Developed from organisms which arose from chemical reactions in the ocean.

Question - 2

The fossil trilobite was originally

  • A a vertebrate.
  • B an invertebrate
  • C a reptile
  • D a bird.

Question - 3

Who among the following did not propose the theory of evolution?

  • A Jean Baptiste Lamark
  • B Hugo Devries
  • C Gregor Mendel
  • D Charles Darwin

Question - 4

In which book did Lamark publish his theory of organic evolution?

  • A Origin of life
  • B Philosophic Zoologique
  • C Surival of the fittest
  • D Struggle for existence

Question - 5

Who suggested the theory that organs which are not used may eventually lose their function and may even disappear?

  • A Mendel
  • B Darwin
  • C Devries
  • D Lamarck

Question - 6

Who among the following scientists rejected and disproved the Lamarckian theory?

  • A Gregor Mendel
  • B Hugo de Vries
  • C August Weisman
  • D Francis Crick

Question - 7

Which of the following statements is true of Natural selection?

  • A Organisms with favourable characters are selected by nature
  • B Organisms with unfavourable characters are selected by nature
  • C Organisms with favourable characters are selected by man.
  • D Organisms with favourable and unfavourable characters are selected by man.

Question - 8

In the industrial areas of Britain, light coloured peppered moths gradually became black to blend with the changing environment. which of the following principles is highlighted in the given example?

  • A Artificial selection
  • B Natural selection
  • C Lamarckism
  • D Speciation

Question - 9

Which of the following statements is/are true of palaeontology?

  • A It provides indirect evidence in favour of organic evolution.
  • B It does not help us to compare the 'past' with the 'present'.
  • C It helps us to know the exact period of the formation of a species.
  • D All of the above

Question - 10

Which of the following is the connecting link between the birds and reptiles?

  • A Dinosaurs
  • B Mammoths
  • C Archaeopteryx
  • D Pliohippus