Competitive Exams: Botany MCQs (Practice-Test 3 of 104)

  1. Which one of the following is the correct sequence of energy flower in an ecosystem?

    1. Herbivore--Carnivore--a Producer

    2. Carnivore--Herbivore--Decomposer

    3. Producer--Herbivore--Carnivore

    4. Decomposer--Carnivore--

    Herbivore

  2. The rapid extinction of species in the tropical countries is primarily due to

    1. Climatic changes

    2. Increased pollution

    3. Intensive agriculture

    4. Population explosion

  3. Which one of the following is NOT an endangered plant?

    1. Saintapaulia ionantha

    2. Hibiscus micranthus

    3. Hibiscus in Solaris

    4. Ariocarpus agovoides

  4. Haploids are useful for

    1. Production of callus

    2. Production of homozygous diploids

    3. Microdensitometer studies

    4. Induction of giant cells

  5. Mycorrhiza improve the soil structure by

    1. Secreting carbonic acids

    2. Releasing glycosides

    3. Absorbing heavy metals

    4. Adding amino acids

  6. Which one of the following is a genetically engineered antiviral protein?

    1. Interferon

    2. Humulin

    3. Griseofulvin

    4. Fumagillin

  7. p DNA is used in biotechnology of

    1. Protein synthesis

    2. Gene splicing

    3. Residual DNA

    4. Recombinant DNA

  8. Which one of the following pairs is NOT correctly matched?

      • Therophytes
      • Surviving buds lie well above the soil surface
      • Cryptophytes
      • Surviving buds lie under soil surface
      • Hemicryptophyte
      • Surviving buds lie on the soil surface
      • Chemiphytes
      • Surviving buds lie close or above the soil surface
  9. Match list I with List H and select the correct answer:

    List-I List-II
    1. Broad leaf

    2. Growing squabble

    3. Soil erosion

    4. Silviculture

    1. Social forestry

    2. Deforestation

    3. Afforestation

    4. Deciduous forest

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 2
      • 3
      • 1
      • 3
      • 2
      • 4
      • 3
      • 1
      • 2
      • 4
      • 4
      • 1
      • 3
      • 2
  10. Blue boy (Methenoglobinemia) disease is caused by the contamination of drinking water with

    1. Chloride

    2. Nitrate

    3. Sulphate

    4. Iodide

  11. Which one of the following plant species is NOT a sand binder in the semi arid region?

    1. Salvadora indica

    2. Calotropis procera

    3. Saccharum munja

    4. Saccharum spontaneum

  12. The main reason for global warming is

    1. Gradually increasing temperature of the Sun

    2. Gradually increasing temperature in the earth core

    3. Increased accumulation of CO2 in air

    4. Establishment of more industries using exothermic processes

  13. Consider the following trees cultivated extensively in India:

    1. Eucalyptus spp.

    2. Acacia auriculiformis

    3. Lencaena lencocephala

    Which of these trees have been introduced from Australia?

    1. l, 2 and 3

    2. l and 3

    3. 2 and 3

    4. 1and 2

  14. An instance of an intergeneric hybrid through protoplast fusion is

    1. Arabidopsis thaliana x Brassica campestris

    2. Nicotiana tabacum x Atropa belladonna

    3. Daucus carota x Beta vulgaris

    4. Datura innoxia x Plumbago zeylanica

    • Assertion (A): In plants, which flower in short-day length, the flowering response is primarily due to the length of the light period.
    • Reason (R): The vegetative buds of SDP are conversed into flower primordial in the dark period.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true