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General Knowledge :: Biology

  1. Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with

  2. A.

     all gymnosperms, except conifers

    B.

     only angiosperms

    C.

     only conifers

    D.

     angiosperms and all gymnosperms except conifers


  3. One of the following is not a function of bones.

  4. A.

     Place for muscle attachment

    B.

     Protection of vital organs

    C.

     Secretion of hormones for calcium regulation in blood and bones

    D.

     Production of blood corpuscles


  5. Plants absorb most part of water needed by them through their

  6. A.

     embryonic zone

    B.

     growing point

    C.

     root hairs

    D.

     zone of elongation


  7. Photo-oxidation is

  8. A.

     photorespiration

    B.

     photolysis

    C.

     light and oxygen induced breakdown

    D.

     All of the above


  9. Process of cell division can take place by

  10. A.

     heterosis

    B.

     fusion

    C.

     mitosis

    D.

     None of these


  11. Most highly intelligent mammals are

  12. A.

     whales

    B.

     dolphins

    C.

     elephants

    D.

     kangaroos


  13. Plant development is influenced by

  14. A.

     quality of light only

    B.

     quality and quantity of light

    C.

     quality and duration of light

    D.

     quality, quantity and duration of light


  15. Prokaryotic cells lack

  16. A.

     nucleolus

    B.

     nuclear membrane

    C.

     membrane bound by organelles

    D.

     All of these


  17. Photosynthesis takes place faster in

  18. A.

     yellow light

    B.

     white light

    C.

     red light

    D.

     darkness


  19. Nucleus, the genetic material containing rounded body in each cell, was first discovered in 1831 by

  20. A.

     Robert Hooke

    B.

     Robert Brown

    C.

     Rudolf Virchow

    D.

     Theodore Schwann