Competitive Exams: Botany MCQs (Practice-Test 79 of 104)

  1. Strong is caused by the

    1. Depletion of ozone layer

    2. Presence of high humidity in the atmosphere

    3. Rapid accumulation of co2 in the atmosphere

    4. Rapid build-up of products of photochemical oxidation of pollutants in the atmosphere

  2. The easiest way to improved the denuded forests of teak in India in to

    1. Apply mycorrhiza

    2. Apply fertilizer

    3. Add bacterial culture

    4. Use green algae

  3. Which one of the following groups of plants is used in social forestry?

    1. Mango, Peepul, Neem, Poinsettia

    2. Eucalyptus, Mango, Banyan, Euphoria

    3. Subabul, Eucalyptus, Casuarinas, Bamboo

    4. Subabul, Banyan, Banana, Coconut

  4. The fo0ur important steps of ecological succession consist of

    1. Invasion

    2. Ecesis

    3. Competition

    4. Migration

    The correct sequence in which these steps appear during primary succession is

    1. 2, 1, 3, 4

    2. 1, 2, 3, 4

    3. 2, 1, 4, 3

    4. 1, 2, 4, 3

  5. Which one of the following is an important sugar yielding crop that can be profitably cultivated in soils having a high amount of sodium?

    1. Sugar-beet

    2. Palymyra palm

    3. Sugarcane

    4. Sweet potato

  6. A virgin island has recently been formed naturally in the Bay of Bengal neat the Indian sub-continent. Which one of the following sets of plants can most appropriately be grown in this area for its consolidation?

    1. Picea and Abies

    2. Platanus and salix

    3. Avicennia and Rhizophroa

    4. Hopea and Casuarina

  7. Which one of the following pairs is not correctly matched?

      • Bioremediation
      • Microbe mediated cleaning of pollution
      • Southern blot
      • DNA hybridization
      • Western blot
      • Dideoxy method of DNA sequencing
      • Northern blot
      • Sequencing of RNA
  8. The preparation of rubber consists of the following steps:

    1. Tapping

    2. Smoking

    3. Pressing

    4. Coagulation

    The correct sequence of these steps is

    1. 1, 2, 3, 4

    2. 1, 4, 3, 2

    3. 1, 4, 2, 3

    4. 1, 3, 4, 2

  9. Match List I (Plant) with List II (Edible part) and select the correct answer using the codes given below the lists:

    List-I List-II
    1. Cashwe nut

    2. Coconut

    3. Cassava

    4. Litchi

    1. Aril

    2. Cotyledons

    3. Root

    4. Endosperm

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 1
      • 3
      • 4
      • 2
      • 2
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 1
  10. Match List I (Plant) with List II (Use) and select the correct answer using the codes given below the Lists:

    List-I List-II
    1. Azadirachta Indica

    2. Corchorus capsualaris

    3. Acacia arabica

    4. Thea sinensis

    1. Beverage

    2. Gum

    3. Medicine

    4. Fibre

    • A
    • B
    • C
    • D
      • 3
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 2
      • 1
      • 4
      • 3
      • 1
      • 2
  11. Consider the following statements: In a ripe tomato, as compared to an unripe tomato, the amount of

    1. Vitamins is higher

    2. Carbohydrates is less

    3. Minerals is less

    4. Proteins is higher

    Of these statements

    1. 1, 3 and 4 are correct

    2. 1, 2 and 4 are correct

    3. 2, 3 and 4 are correct

    4. 1, 2 and 3 are correct

  12. The high protein content of legumes (pluses) is correlated with

    1. Application of fertilizers to the soil

    2. Nitrogen content of the soil

    3. Nitrogen-fixing bacteria present in the roots

    4. Their tropical or temperate origin

  13. The species in which the evolutionary process has been influenced by man to meet his needs is called

    1. Adventives species

    2. Introduced species

    3. Naturalized species

    4. Domesticated species

  14. Cedar wood oil, an important mounting medium and used in oil immersion lenses for microscopic studies is obteined from

    1. Cedrus deodara

    2. Juniperus virginiana

    3. Abies spectabilis

    4. Pinus roxburghii

  15. Which of the following pairs of structure and functions are correctly matched?

      • Tendril
      • Climbing
      • Penumatophore
      • Respiration
      • Stratospheric
      • Checking UV or beta
      • Ozone shield
      • UV rays.

    Select the correct answer using the codes given below:

    1. 2 and 3 only

    2. 1 and 2 only

    3. 1 and 3 only

    4. 1, 2 and 3