Class XI & XII · Biology practice
Botany PYQs Check your understanding, bookmark questions and revisit your mistakes.
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408 questions in this collection · Page 12 of 41
Biomolecules
Which of the following are not secondary
metabolites in plants?
A Morphine, codeine B Amino acids, glucose C Vinblastin, curcumin D Rubber, gums
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Cell Cycle And Cell Division
Which of the following stages of meiosis involves
division of centromere?
A Metaphase I B Metaphase II C Anaphase II D Telophase II
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Transport In Plants
Match List-I with List-II.
List-I
List-II
(A)Cohesion
(I)More attraction in liquid phase
(B)Adhesion
(II)Mutual attraction among water molecules
(C)Surface tension
(III)Water loss in liquid phase
(D)Guttation
(IV)Attraction towards polar surfaces
Choose the correct answer from the options given below:
A A-IV, B-III, C-II, D-I B A-III, B-I, C-IV, D-II C A-II, B-I, C-IV, D-III D A-II, B-IV, C-I, D-II
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Photosynthesis In Higher Plants
The first stable product of CO2 fixation in sorghum is:
A Pyruvic acid B Oxaloacetic acid C Succinic acid D Phosphoglyceric acid
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Plant Growth And Development
The site of perception of light in plants during
photoperiodism is:
A Shoot apex B Stem C Axillary bud D Leaf
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Plant Growth And Development
The plant hormone used to destroy weeds in a field
is:
A IAA B NAA C 2,4-D D IBA
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Plant Growth And Development
Plants follow different pathways in response to
environment or phases of life to form different kinds of structures. This ability is called:
A Elasticity B Flexibility C Plasticity D Maturity
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Reproduction In Organisms
Which of the following plants is monoecious?
A Carica papaya B Chara C Marchantia polymorpha D Cycas circinalis
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Explanation: Chara (a freshwater alga) is monoecious in NCERT terms because it bears both male (antheridia) and female (oogonia) sex organs on the same plant. This means one individual can produce both male and female gametes, fulfilling the monoecious condition.
🧠 Did You Know? In higher plants, monoecious species have separate male and female flowers on the same individual, while dioecious species have male and female flowers on separate individuals.
💡 NCERT Memory Line: Monoecious = same plant bears both male and female sex organs (antheridia and oogonia present).
Sexual Reproduction In Flowering Plants
A typical angiosperm embryo sac at maturity is:
A 8-nucleate and 7-celled B 7-nucleate and 8-celled C 7-nucleate and 7-celled D 8-nucleate and 8-celled
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Sexual Reproduction In Flowering Plants
The term used for transfer of pollen grains from
anthers of one plant to stigma of a different plant
which, during pollination, brings genetically different types of pollen grains to stigma, is :
A Xenogamy B Geitonogamy
C Chasmogamy D Cleistogamy
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