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12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key

12th Standard

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Biology

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. Darwin’s finches are an excellent example of

    (a)

    connecting links

    (b)

    seasonal migration

    (c)

    adaptive radiation

    (d)

    parasitism

  2. Which among the following awards instituted by the Government of India for individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting Wildlife?

    (a)

    Indira Gandhi Paryavaran Puraskar

    (b)

    Medini Puruskar Yojana

    (c)

    Amrita Devi Bishnoi Award

    (d)

    Pitambar Pant National Award

  3. Identify the incorrect pair

    (a)

    sporopollenin - exine of pollen grain

    (b)

    tapetum – nutritive tissue for developing microspores

    (c)

    Nucellus – nutritive tissue for developing embryo

    (d)

    obturator – directs the pollen tube into micropyle

  4. Pure tall plants are crossed with pure dwarf plants. In the F1 generation, all plants were tall. These tall plants of F1 generation were selfed and the ratio of tall to dwarf plants obtained was 3:1. This is called

    (a)

    Dominance

    (b)

    Inheritance

    (c)

    Codominance

    (d)

    Heredity

  5. Which of the following one is used as a Biosensors?

    (a)

    Electrophoresis

    (b)

    Bioreactors

    (c)

    Vectors

    (d)

    Electroporation

  6. Virus free plants are developed from

    (a)

    Organ culture

    (b)

    Meristem culture

    (c)

    Protoplast culture

    (d)

    Cell suspension culture

  7. In soil water available for plants is

    (a)

    gravitational water

    (b)

    chemically bound water

    (c)

    capillary water

    (d)

    hygroscopic water

  8. Pedogenesis refers to

    (a)

    Fossils

    (b)

    Water

    (c)

    Population

    (d)

    Soil

  9. Profundal zone is predominated by heterotrophs in a pond ecosystem, because of

    (a)

    with effective light penetration

    (b)

    no effective light penetration

    (c)

    complete absence of light

    (d)

    a and b

  10. Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

    (a)

    Ammonia

    (b)

    Methane

    (c)

    Nitrous oxide

    (d)

    Ozone

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