Competitive Exams: Botany MCQs (Practice-Test 14 of 104)

  1. Gaseous mixture used by Miller for synthesis of amino acids through heat and electric discharge included

    1. Methane, ammonia, hydrogen and water vapours

    2. Methane, ammonia, nitrogen and water vapours

    3. Methane, nitrogen, hydrogen and water vapours

    4. Ammonia, carbon dioxide, nitrogen and water vapours

  2. Speciation occurs when

    1. Gene flow within the common pool is interrupted by an isolating mechanism

    2. Competition occurs between members of two populations for resources

    3. Niches of two closely related individuals get over-lapped

    4. Nutrients limit gene flow between individuals

  3. Which one of the following tissue systems is responsible for the gritty texture of pear fruit?

    1. Macrosciereids

    2. Osteosclereids

    3. Brachysciereids

    4. Asteroscelereids

  4. Primary phloem, secondary phloem, internal phloem and included phloem, occur in the stem of

    1. Salvadora

    2. Leptadenia

    3. Aristolochia

    4. Nyctanthes

  5. The cytoplasm bridges that interconnect plant cells and selectively traffic macromolecules from one cell to another are known as

    1. Microtubules

    2. Middle lamella

    3. Plasmodesmata

    4. Phragmoplast

  6. Growth in length of intimates occurs by the activity of

    1. Lateral meristem

    2. Procambium

    3. Intercalary meristem

    4. Apical meristem

  7. According to the rule of nomenclature, the name of a species is expressed by two words. The plants name Veronica anagallis aquatica consists of three words. Which one of the following expresses the name correctly in two words?

    1. Veronica anagallis-aquatica

    2. Veronica anagallis and aquatica

    3. Veronica (anagallis aquatica)

    4. Veronica anagallisaquatica

  8. If Sisymbrium murale is transferred to the geneus Diplotaxis with the new binomial combination. Diplotaxis muralis (Linn.) DC, then Sisymbrium murale Linn. Will be known as

    1. Homonym

    2. Tautonym

    3. Basionym

    4. Autonym

  9. Which one of the following is the most important criterion used to classify living organisms into three primary kingdoms, namely-Archaea, Eubacteria and Eukarya?

    1. Genetic relatedness

    2. Morphological characters

    3. Physiological characters

    4. Phenotypic characters

  10. The principles of which of the following taxonomic methods are also known as neo-Adansonian Principles?

    1. Taxometrics

    2. Cladistics

    3. Phenetics

    4. Phyletics

    Select the correct answer using the codes given below:

    1. 1 and 2

    2. 1 and 3

    3. 2 and 3

    4. 4 only

  11. Centrospermae is regarded a natural order of angiosperms. All except two of its families contain the pigments that are collectively called battalions. Some of the families of the order are enumerated below. Which two families lack betalains?

    1. Amaranthaceae

    2. Aizoaceae

    3. Chenopodiaceae

    4. Caryophyllaceae

    5. Mouginaceae

    Select the correct answer using the codes given below:

    1. 1 and 2

    2. 2 and 3

    3. 3 and 4

    4. 4 and 5

  12. Match list I with List II and select the correct answer:

    List-I List-II
    1. Gel electrophoreses

    2. Serology

    3. DNA-DNA hybridization

    4. Restriction site analysis

    1. Annealing

    2. Isozymes

    3. Southern blots

    4. Antiserum

    5. Sequencing

    • A
    • B
    • C
    • D
      • 5
      • 2
      • 1
      • 4
      • 2
      • 1
      • 3
      • 4
      • 2
      • 4
      • 1
      • 3
      • 3
      • 4
      • 2
      • 5
  13. Proteinaceous infectious particles without nucleation acids are known as

    1. Viroids

    2. Virusoids

    3. Prions

    4. Virions

  14. Match List I (Name of genera) with List II (Name of classes) and select the correct answer:

    List-I List-II
    1. Saprolegnia

    2. Claviceps

    3. Agaricus

    4. Fusarium

    1. Deuteromycetes

    2. Oomycetes

    3. Ascomycetes

    4. Basidiomycetes

    • A
    • B
    • C
    • D
      • 2
      • 1
      • 3
      • 4
      • 2
      • 3
      • 4
      • 1
      • 3
      • 4
      • 2
      • 1
      • 1
      • 3
      • 4
      • 2
  15. A structure is lichens that is similar to stomata in function is known as

    1. Soredium

    2. Isidium

    3. Cyphellae

    4. Cynalle