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General Knowledge :: Biology

  1. Primary phloem develops from

  2. A.

     lateral meristem

    B.

     protoderm

    C.

     extrastelar cambium

    D.

     provascular tissue


  3. Other than spreading malaria, anopheles mosquitoes are also vectors of

  4. A.

     dengue fever

    B.

     filariasis

    C.

     encephalitis

    D.

     yellow fever


  5. Plants that grow in saline water are called

  6. A.

     halophytes

    B.

     hydrophytes

    C.

     mesophytes

    D.

     thallophytes


  7. Pyorrhoea is a disease of the

  8. A.

     nose

    B.

     gums

    C.

     heart

    D.

     lungs


  9. O2 released in the process of photosynthesis comes from

  10. A.

     CO2

    B.

     water

    C.

     sugar

    D.

     pyruvic acid


  11. Placenta is the structure formed

  12. A.

     by the union of foetal and uterine tissue

    B.

     by foetus only

    C.

     by fusion of germ layers

    D.

     None of these


  13. Plants hormone that induces cell division is

  14. A.

     auxins

    B.

     gibberellins

    C.

     kinins

    D.

     domins


  15. Neurospora is used as genetic material because

  16. A.

     it has short life cycle of 10 days

    B.

     the product of single meiosis can be easily analysed

    C.

     meiotic products are linearly arranged in the form of ordered tetrads

    D.

     is a diploid fungus


  17. Phloem is a tissue found in

  18. A.

     reproductive organs of animals

    B.

     plants

    C.

     insects

    D.

     mammals


  19. N2 content is kept constant in the biosphere due to

  20. A.

     N2 fixation

    B.

     industrial pollution

    C.

     nitrogen cycle

    D.

     absorption of N2