Competitive Exams: Botany MCQs (Practice-Test 73 of 104)

  1. Which of the following are the important characteristics of prokaryotes (methanogenic bacteria)?

    1. These cannot convert hydrogen to methane.

    2. These cannot use co2 as the growth substrate in which co2 is reduced to methane.

    3. These cannot grow autotrophic ally.

    4. Those dwelling in sludge supernatant may require organics growth factors for growth.

    Select the correct answer using the codes given below:

    1. 1, 2 and 3

    2. 1, 3 and 4

    3. 1, 2 and 4

    4. 2, 3 and 4

  2. Flowering plants which are the dominant species today started appearing on the Earth during the

    1. Cabrian

    2. Creataceous

    3. Carboniferous

    4. Permian

  3. Occurrence of heterostyled in some flowering plants is evolutionary phenomenon exemplifying

    1. Multiallelic sexual incompatibility

    2. Homomorphism sexual incompatibility

    3. Dialogic sexual incompatibility

    4. Pleiotropic effect

  4. The most widespread bout distinctive cytogenesis process involved in the speciation of higher plants is

    1. Interspecififc hybridization

    2. Autosomal mutation

    3. Polyploidy

    4. Apomixes

  5. Plants growing at the equator are characterized by the absence of

    1. Secondary growth

    2. Heart and sap wood

    3. annual rings

    4. Soft wood

  6. In Tilia the leaves are two-ranked and the nodes are

    1. Unilacuar

    2. Trilacunar

    3. Pentalacunar

    4. Multilacunar

  7. On cool nights, following sultry days, water is found at the tips and margins of tomato leaves in the form of dew drops. Every drops marks the location of

    1. stomata

    2. lenticels

    3. Hydathoda

    4. Trichome

  8. Which one of the following histogens is present in the roots but Not in the shoots?

    1. Calyptrogen

    2. Dermatogen

    3. Periblem

    4. Plerome

  9. The above illustrations depict the differentiation

    1. Vessel Element

    2. Secretary idioblast

    3. sieve tube

    4. Bast fiber

  10. Which one of the following is the modern approach is plant taxonomy?

    1. t-RNA analysis

    2. DNA fingerprinting

    3. Numerical taxonomy

    4. r-RNA analysis

  11. Neotype is designated when

    1. All the original materials are lost

    2. Syntype is not available

    3. Holotype is lost

    4. isotype is available

  12. Consider the following criteria:

    1. Cell type

    2. Level of organization

    3. Mode of reproduction

    4. Mode of nutrition

    The criteria which formed the basis of the five-kingdom classification include

    1. 1, 2 and 3

    2. 2, 3 and 4

    3. 1, 2 and 4

    4. 1, 3 and 4

  13. Match List I (Families) and List II (Placenta ions) and select the correct answer using the codes given below the lists.

    List-I List-II
    1. Caryophyllacene

    2. Caesalpiniaceous

    3. Solanaceae

    4. Papaveraceae

    1. Marginal

    2. Parietal

    3. Central

    4. Axial

    • A
    • B
    • C
    • D
      • 3
      • 2
      • 1
      • 4
      • 3
      • 1
      • 4
      • 2
      • 1
      • 2
      • 3
      • 4
      • 1
      • 4
      • 3
      • 2
  14. In addition to bordered pits, tertiary spiral thickenings are also found in the tracheids of

    1. Pinus

    2. Macrozamic

    3. Taxus

    4. Ephedra

  15. Aposporously formed gametophytes in Dryopetris will bear gametes that are

    1. Haploid

    2. Diploid

    3. Triploid

    4. Tetraploid