Competitive Exams: Botany MCQs (Practice-Test 63 of 104)

  1. Life is believed to have arisen when organic molecules were abundant in the sea and when there was no O2 to oxidize them.

    1. The promotions

    2. The repairers

    3. The photosynthesizes

    4. None of the above

  2. The modern synthetic theory of evolutions\assumes a positive role of which of the following in evolution?

    1. Natural selection

    2. Acquired characters

    3. Artificial selection

    4. Mutations

      1. 1 and 2

      2. 1 and 3

      3. 2, 3 and 4

      4. 1 and 4

  3. Radial conduction of water and food material in the woody stems is the functions of

    1. Endodermis

    2. Xylem fibres

    3. Vessels

    4. Vascular rays

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

    List-I List-II
    1. When the leaf lis rolled from one margin to the other

    2. When the leaf is rolled from the apex towards the base

    3. When upper half of the lower half

    4. When the leaf is folded lengthwise along the midrib

    1. Centuplicate

    2. Convolute

    3. Criminate

    4. Replicate

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 4
      • 3
      • 3
      • 2
      • 1
      • 4
      • 2
      • 3
      • 4
      • 1
  5. Ottelia alsimodies (Linn.) Pers. Syn. PI, 1: 400.1807 stratiotes alsimoides Linn. Sp. PI. 535.1753 In this citation steatites alimonies Linn. Is a

    1. Basionum

    2. Autonym

    3. Tautonym

    4. Homonvm

  6. Which one of the following statements about the five-kingdom classification system is correct?

    1. Organisms are divided into kingdoms on the basis of their evolutionary history

    2. All one-celled organisms kingdom area grouped in a single

    3. All prokaryotes are grouped in a single kingdom

    4. All heterotrophy are grouped in one kingdom

  7. Match List I with List II and select the correct answer

    List-I (Old name) List-II (New name)
    1. Gramineae

    2. Umbelliferae

    3. Palmae

    4. Labiatae

    1. Poaceae

    2. Apiaceae

    3. Arecaceae

    4. Lamiaceae

    • A
    • B
    • C
    • D
      • 1
      • 3
      • 4
      • 2
      • 1
      • 2
      • 3
      • 4
      • 4
      • 3
      • 2
      • 1
      • 4
      • 3
      • 1
      • 2
  8. Match List I with List II and select the correct answer.

    List-I (Families) List-II (Characters of Gynoecium's)
    1. Composites

    2. Leguminous

    3. Malvaceae

    4. Cruciferae

    1. Bicarpellary, syncarpous and superior

    2. Bicarpellary, syncarpous and inferior

    3. Monocarpellary and superior

    4. Syncarpous, superior with axial placenta ion

    • A
    • B
    • C
    • D
      • 2
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 1
      • 4
      • 1
      • 2
      • 3
      • 4
      • 2
      • 1
      • 3
  9. Which of the following statements are correct?

    1. Rule of Priority in plant nomenclature commenced from 1853

    2. Binomial nomenclature was introduced by Linnaeus in 1753

    3. The orchid fruit contains five distinct seeds

    4. Gynobasic style is found in Lamiaceae

    Select the correct answer using the codes given below:

    1. 1 and 2

    2. 2 and 4

    3. 1 and 3

    4. 2 and 3

  10. Placement of Gymnosperms between Dicotyledons and Monocotyledons is one of the drawbacks in the system of classification of

    1. Rendle

    2. Bentham and Hooker

    3. Engler and Prantl

    4. Linnaeus

  11. Operational taxonomic units are used in

    1. Categorizing taxonomic characters

    2. Arrangement of herbarium sheets

    3. Numerical methods of analysis

    4. Identifying plants in the field

  12. Eaters are

    1. Diploid in Marchantia and haploid in Pellia

    2. Haploid in Marchantia and diploid in Pellia

    3. Haploid in both Marchantia and Pellia

    4. Diploid in both Marchantia and Pellia

  13. Penicillin kills bacteria by

    1. Suppression of clef-wall synthesis

    2. Lyses of protoplasm

    3. Interfering with RNA synthesis

    4. Inhibiting DNA synthesis

  14. Which one of the following bacteria can carry out photosynthesis?

    1. Closthdium

    2. Chlorobiuin

    3. Rhizobium

    4. Aerobatic

  15. Match List I with List II and select the correct answer

    List-I List-II
    1. Double fertilization

    2. Oogamy

    3. Sexduction

    4. Gmetangia1 fusion

    1. Bacteria

    2. Mucor

    3. Riccia

    4. Volvox

    5. Angiosperms

    • A
    • B
    • C
    • D
      • 2
      • 3
      • 5
      • 4
      • 1
      • 4
      • 5
      • 2
      • 2
      • 3
      • 1
      • 5
      • 5
      • 4
      • 1
      • 2
  16. Chitin is an important cell-wall component in

    1. Algae

    2. Fungi

    3. Bryophyte

    4. Pteridophye