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NEET Botany MCQs: Class-XI and Class-XII



NEET Botany MCQs: Class-XI and Class-XII

Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

[class-xii ]

  • Resource partitioning
  • Competitive release
  • Mutualism
  • Predation
  • Correct Option: A  [ Resource partitioning ]

    Remark:

Amensalism can be represented as:

[class-xii ]

  • Species A (–); Species B (0)
  • Species A (+); Species B (+)
  • Species A (–); Species B (–)
  • Species A (+); Species B (0)
  • Correct Option: A  [ Species A (–); Species B (0) ]

    Remark:

The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:

[class-xii ]

  • Climax
  • Climax community
  • Standing state
  • Standing crop
  • Correct Option: C  [ Standing state ]

    Remark:

Which of the following statements is not correct?

[class-xii ]

  • Pyramid of biomass in sea is generally inverted.
  • Pyramid of biomass in sea is generally upright.
  • Pyramid of energy is always upright.
  • Pyramid of numbers in a grassland ecosystem is upright.
  • Correct Option: B  [ Pyramid of biomass in sea is generally upright. ]

    Remark:

In the equation GPP–R = NPP.
R represents:

[class-xii ]

  • Radiant energy
  • Retardation factor
  • Environment factor
  • Respiration losses
  • Correct Option: D  [ Respiration losses ]

    Remark:

Which of the following statements is correct?

[class-xi ]

  • Fusion of two cells is called Karyogamy.
  • Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy.
  • Organisms that depend on living plants are called saprophytes.
  • Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells.
  • Correct Option: B  [ Fusion of protoplasms between two motile on non-motile gametes is called plasmogamy. ]

    Remark:

Match Column-I with Column-II.
Choose the correct answer from the options given below:

Image

[class-xi ]

  • A-I, B-II, C-III, D-IV
  • A-II, B-III, C-IV, D-I
  • A-IV, B-II, C-I, D-III
  • A-III, B-IV, C-II, D-I
  • Correct Option: D  [ A-III, B-IV, C-II, D-I ]

    Remark:

Select the correct pair.

[class-xi ]

  • Large colorless empty cells in the epidermis of grass leaves - Subsidiary cells
  • In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue
  • Cells of medullary rays that form part of cambial ring - Interfascicular cambium
  • Loose parenchyma cells rupturing the epidermis and forming a lensshaped opening in bark - Spongy parenchyma
  • Correct Option: C  [
    Cells of medullary rays that form part of cambial ring Interfascicular cambium
    ]

    Remark:

Match List-I with List-II.

List-I List-II
(A)Protein (I)C = C double bonds
(B)Unsaturated fatty acid (II)Phosphodiester bonds
(C)Nucleic acid (III)Glycosidic bonds
(D)Polysaccharide (IV)Peptide bonds
Choose the correct answer from the options given below:

[class-xi ]

  • A-I, B-IV, C-III, D-II
  • A-II, B-I, C-IV, D-III
  • A-IV, B-III, C-I, D-II
  • A-IV, B-I, C-II, D-III
  • Correct Option: D  [ A-IV, B-I, C-II, D-III ]

    Remark:

Match List-I with List-II.

List-I List-II
(A)S phase (I)protein are synthesized
(B)G2 phase (II)Inactive phase
(C)Quiescent stage (III)Interval between mitosis and initiation of DNA replication
(D)G1 phase (IV)DNA replication
Choose the correct answer from the options given below:

[class-xi ]

  • A-IV, B-II, C-III, D-I,
  • A-IV, B-I, C-II, D-III,
  • A-II, B-IV, C-III, D-I,
  • A-III, B-II, C-I, D-IV,
  • Correct Option: B  [ A-IV, B-I, C-II, D-III, ]

    Remark: