NEET Biology Plant Growth and Development MCQs Set 07

Biology Objective Questions and Answers: Plant Growth and Development

Explore reliable objective questions for Plant Growth and Development tailored for NEET learners. Utilizing these Biology multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.

Download Plant Growth and Development MCQs with Answers

Access the complete set of multiple-choice questions for Plant Growth and Development below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official NEET textbooks.

Multiple Choice Questions

Question 1: Which of the following is incorrect about ethylene?
(a) Promotes root hair formation
(b) It is natural and derivative of carotenoids
(c) It increases the number of female flowers
(d) It causes synchronisation of flowering and fruit set in pineapples
Show Answer & Explanation

Answer: (b) It is natural and derivative of carotenoids

Explanation:
1. Ethylene synthesized from methionine.

Question 2: Select a correct match
(a) GA3 – Early seed production in conifers.
(b) Cytokinin – Synchronise fruit set in pineapples.
(c) Auxin – Overcomes senescence.
(d) Ethylene – Seed maturation and development
Show Answer & Explanation

Answer: (a) GA3 – Early seed production in conifers.

Explanation:
1. In conifers, GA3 induced the early seed production.

Question 3: Which of the following phytohormone is a derivative of carotenoids?
(a) Auxin
(b) ABA
(c) Ethylene
(d) Cytokinin
Show Answer & Explanation

Answer: (b) ABA

Explanation:
1. ABA - It is derivative of carotenoids, precursor of ABA is violaxanthin.

Question 4: Match the following (Column - I with Column II)<br />Column I Column II<br />a. Weedicide (i) GA3<br />b. Bolting (ii) Cytokinin<br />c. Thinning of cotton (iii) Ethylene<br />d. Lateral shoot growth (iv) 2, 4-D
(a) a(iii), b(ii), c(iv), d(i)
(b) a(iv), b(i), c(iii), d(ii)
(c) a(iv), b(i), c(ii), d(iii)
(d) a(iv), b(ii), c(iii), d(i)
Show Answer & Explanation

Answer: (b) a(iv), b(i), c(iii), d(ii)

Explanation:
1. Weedicide  Auxin i.e., 2, 4, D Bolting  GA Thining of cotton  Ethylene Lateral shoot growth  Cytokinin.

Question 5: Dormancy of seeds is broken by ethylene whereas it is induced by
(a) Abscisic acid
(b) Auxin
(c) Cytokinin
(d) Gibberellic acid
Show Answer & Explanation

Answer: (a) Abscisic acid

Explanation:
1. Dormancy of seeds is induced by abscisic acid.

Question 6: The plant hormone which closes the stomata in stressful conditions is
(a) Cytokinin
(b) GA
(c) Auxin
(d) ABA
Show Answer & Explanation

Answer: (d) ABA

Explanation:
1. To prevent transpiration in stressfull condition.

Question 7: Both ethylene and ABA are responsible for
(a) Promoting the abscission of leaves and fruits
(b) Inducing dormancy of seeds
(c) Stimulation of apical dominance
(d) Ripening
Show Answer & Explanation

Answer: (a) Promoting the abscission of leaves and fruits

Explanation:
1. Ethylene and ABA causing shedding of leaves and fruits, flowers.

Question 8: Florigen results in conversion of
(a) Reproductive bud  Vegetative bud
(b) Shoot apex  Flowering bud
(c) Root apex  Reproductive bud
(d) Vegetative bud  Lateral shoot
Show Answer & Explanation

Answer: (b) Shoot apex  Flowering bud

Explanation:
1. Florigen is a hormonal substance responsible for flowering, it migrates from leaves to shoot apices for inducing flowering.

Question 9: Which type of plants can blossom throughout the year?
(a) Long day plants
(b) Short-long day plants
(c) Short-day plants
(d) Day neutral plants
Show Answer & Explanation

Answer: (d) Day neutral plants

Explanation:
1. Day neutral plants i.e., no correlation between exposure to light and flower production.

Question 10: Which of the following is an example of short day plant?
(a) Tobacco
(b) Sugarbeet
(c) Wheat
(d) Radish
Show Answer & Explanation

Answer: (a) Tobacco

Explanation:
1. Tobacco is a short day plant.

Question 11: Most of the winter flowering plants belong to
(a) Short long day plants
(b) Long day plants
(c) Short day plants
(d) Day neutral plants
Show Answer & Explanation

Answer: (c) Short day plants

Explanation:
1. This is so because sunlight duration is less during winters.

Question 12: Cucumber and tomato are the examples of
(a) Day neutral plants
(b) Short day plants
(c) Long day plants
(d) Long short day plants
Show Answer & Explanation

Answer: (a) Day neutral plants

Explanation:
1. In cucumber and tomato flowering occurs throughout year i.e., day neutral plants.

Question 13: The hormonal substance which migrates from leaves to shoot apices to induce flowering is
(a) Dormin
(b) Zeatin
(c) Kinetin
(d) Florigen
Show Answer & Explanation

Answer: (d) Florigen

Explanation:
1. Florigen is a hypothetical hormone.

Question 14: Some plants like sugarbeet and cabbage required low temperature for flowering. This phenomenon is called
(a) Photoperiodism
(b) Parthenocarpy
(c) Vernalisation
(d) Abscission
Show Answer & Explanation

Answer: (c) Vernalisation

Explanation:
1. Low temperature treatment given to seeds to induce flowering.

Question 15: Which of the following is incorrect about vernalisation?
(a) It prevents precocious reproductive development
(b) It is observed in winter variety of wheat
(c) Flowering is stimulated by low temperature
(d) It is the resting stage of seeds
Show Answer & Explanation

Answer: (d) It is the resting stage of seeds

Explanation:
1. Vernalization is not the resting stage of seeds.

Question 16: During vernalisation, the stimulus of low temperature is perceived by
(a) Stem apex
(b) Leaves
(c) Roots
(d) Bark
Show Answer & Explanation

Answer: (a) Stem apex

Explanation:
1. During vernalisation, the stimulus of low temperature is perceived by shoot apex of the plants.

Question 17: Growth in plant organs is
(a) Qualitative and extrinsic
(b) Quantitative and intrinsic
(c) Qualitative and intrinsic
(d) Quantitative and extrinsic
Show Answer & Explanation

Answer: (b) Quantitative and intrinsic

Explanation:
1. Organs made up different tissues inside the plant body.

Question 18: The growth in plants differs from growth in animals in
(a) Being localized and indefinite
(b) Being indefinite
(c) Having indefinite lifespan
(d) Having definite lifespan
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Answer: (a) Being localized and indefinite

Explanation:
1. Growth in plant is unlimited, indeterminate and indefinite.

Question 19: Find out the correct statement(s).<br />(a) Growth in plants is internal/intrinsic and open ended<br />(b) Formation of cellular materials is called real or protoplasmic growth<br />(c) Plant growth is diffused only during the early embryonic stage
(a) Only (a) & (b)
(b) (b) only
(c) Only (b) & (c)
(d) (a), (b) & (c)
Show Answer & Explanation

Answer: (d) (a), (b) & (c)

Explanation:
1. This option, (a), (b) & (c), is the one that agrees with the standard NCERT facts for this topic.

Question 20: Find odd one w.r.t. differentiation
(a) Loss of nucleus in sieve
(b) Death of protoplasm in tracheary elements
(c) Callus formation
(d) Lignification in vessels
Show Answer & Explanation

Answer: (c) Callus formation

Explanation:
1. Mass of undifferentiated cells.

Question 21: Which of the given is/are examples of differentiation?
(a) Loss of nucleus and perforations in some sieve tube members
(b) Lignin deposition in tracheids and vessels
(c) Differential wall thickening in guard cells
(d) More than one option is correct
Show Answer & Explanation

Answer: (d) More than one option is correct

Explanation:
1. Permanent change in structure, biochemistry, size and physiology of cell is called differentiation.

Question 22: The direction of the transport of auxins is
(a) Polar in basipetal
(b) Polar in acropetal
(c) Through xylem
(d) Through phloem
Show Answer & Explanation

Answer: (a) Polar in basipetal

Explanation:
1. Auxin movement is polar, it is basipetal in stem.

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FAQs

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