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NEET Practice Questions (MCQs) with Answers & Solutions

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All Physics Chemistry Botany Zoology

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Match the list : Column I (P) Phototropism (Q) Geotropism (R) Hydrotropism (S) Thigmotropism Column II (i) Water (ii) Gravitation (iii) Light (iv) Touch

A. (P-i), (Q-ii), (R-iii), (S-iv) B. (P-iii), (Q-ii), (R-i), (S-iv) C. (P-iv), (Q-iii), (R-ii), (S-i) D. (P-iii), (Q-ii), (R-iv), (S-i)

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Explanation

The correct matching is as follows: (P) Phototropism - Light, (Q) Geotropism - Gravitation, (R) Hydrotropism - Water, (S) Thigmotropism - Touch. This is because:
Phototropism is the growth of a plant in response to light, Geotropism is the growth in response to gravity, Hydrotropism is the growth in response to water, and Thigmotropism is the growth in response to touch.

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In whichtype of dormancy, due to hardness of seed coats or integuments, embryo could not expand during germination?

A. Physical dormancy B. Mechanical dormancy C. External dormancy D. Chemical dormancy

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Explanation

Mechanical dormancy occurs due to the hardness of seed coats or integuments, which prevents the embryo from expanding during germination. This type of dormancy is overcome by processes that soften or break the seed coat, allowing the embryo to grow.

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Which type of dormancy is found when seed is impermeable to water or gaseous exchange ?

A. Physicaldormancy B. Mechanical dormancy C. External dormancy D. Chemical dormancy

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Which type of dormancy, inhibits embryo growth and germination in seed ?

A. Endogenous dormancy B. Physiological dormancy C. External dormancy D. Mixed dormancy

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Explanation

Physiological dormancy is a type of endogenous dormancy where internal factors within the seed, such as hormonal balances, prevent the embryo from growing and germinating even when external conditions are favorable.

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What is the type of dormancy in which embryo do not differentiate into various tissue at the time of fruit maturation?

A. Internal dormancy B. Physiological dormancy C. Externa ldormancy D. Mixed dormancy

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During physiological and physical condition some changes observed in seed, is knows as ......

A. Exogenous dormancy B. Endogenous dormancy C. Combinational dormancy D. Secondary dormancy

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Which type of dormancy is induced in seeds due to adverse condition and high temperature ?

A. Exogenous dormancy B. Endogenous dormancy C. Combinational dormancy D. Secondary dormancy

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Explanation

Secondary dormancy is induced in seeds due to adverse conditions such as high temperature. This type of dormancy occurs when seeds that have broken their initial dormancy encounter unfavorable conditions and go back into a dormant state.

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A: Ethylene inhibits logitudinal growth of root stem and leaves.

B: Ethylene is growth inhibitor, maturation hormone.

A and B both correct, B is explanation of A.

A and B both correct but B is not explanation A.

A= correct, B = false

A= false, B = correct

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Explanation

FACTUAL

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Asseretion - Reasoning type of questions : A:Assertion (Statement) R : Reason A : Seed is active condensed plant. R : It shows specific dormancy and get activated.

A. A and R both correct, R is explanation of A. B. A and R both correct but R is not explanation A. C. A= correct, R = false D. A= false, R = correct

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Asseretion - Reasoning type of questions : A:Assertion (Statement) R : Reason A : Cytokininis cytoplasmic hormone. R : Cytokinin induced cell division.

A. A and R both correct, R is explanation of A. B. A and R both correct but R is not explanation A. C. A= correct, R = false D. A= false, R = correct

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