Year-wise Biology practice

NEET 2021 Biology PYQs

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100 questions in this collection · Page 2 of 10

Question 11 of 100
🟢 NEET 2021 📘 CLASS XI

Biomolecules

Which of the following are not secondary metabolites in plants?
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Question 12 of 100
🟢 NEET 2021 📘 CLASS XI

Cell Cycle And Cell Division

Which of the following stages of meiosis involves division of centromere?
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Question 13 of 100
🟢 NEET 2021 📘 CLASS XI

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
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Question 14 of 100
🟢 NEET 2021 📘 CLASS XI

Photosynthesis In Higher Plants

The first stable product of CO2 fixation in sorghum is:
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Question 15 of 100
🟢 NEET 2021 📘 CLASS XI

Plant Growth And Development

The site of perception of light in plants during photoperiodism is:
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Question 16 of 100
🟢 NEET 2021 📘 CLASS XI

Plant Growth And Development

The plant hormone used to destroy weeds in a field is:
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Question 17 of 100
🟢 NEET 2021 📘 CLASS XI

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:
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Question 18 of 100
🟢 NEET 2021 📘 CLASS XII

Reproduction In Organisms

Which of the following plants is monoecious?

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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).

Question 19 of 100
🟢 NEET 2021 📘 CLASS XII

Sexual Reproduction In Flowering Plants

A typical angiosperm embryo sac at maturity is:
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Question 20 of 100
🟢 NEET 2021 📘 CLASS XII

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 :
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