Take 5 chapter-wise practice tests plus 1 full module test on Plant Growth and Development for NEET with +4/-1 scoring, answer review, and concise explanations.
Attempt 5 focused practice tests and 1 mixed module test for Plant Growth and Development with clean NEET-style MCQs on growth, hormones, flowering, and dormancy.
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1. Plant growth is generally defined as:
Explanation: Growth involves permanent increase produced by cell division and enlargement.
2. The region of active cell division in plants is the:
Explanation: Meristems produce new cells for plant growth.
3. A typical growth curve of plant organs is:
Explanation: Growth often shows lag, log, decelerating, and plateau phases.
4. The phase immediately after cell division in growing root is:
Explanation: Cells increase rapidly in size after being formed.
5. Cells in the maturation region mainly:
Explanation: Maturation is associated with specialization.
6. Increase in dry weight is preferred over fresh weight because:
Explanation: Dry weight better reflects actual material synthesized by the plant.
7. Growth confined to meristematic regions is called:
Explanation: Unlike animals, plant growth occurs at specific regions.
8. Absolute growth rate measures:
Explanation: AGR measures overall increase in dimension or mass with time.
9. Relative growth rate compares growth with:
Explanation: RGR expresses efficiency of growth relative to current size.
10. Development includes growth, differentiation, and:
Explanation: Development is broader than growth alone.
11. Differentiation means that cells:
Explanation: Different cell types arise from similar meristematic cells.
12. Dedifferentiation is shown when mature cells regain the ability to:
Explanation: Example: interfascicular parenchyma becoming meristematic.
13. Formation of secondary xylem from newly formed cambial derivatives is an example of:
Explanation: Cells divide again and then specialize into permanent tissues.
14. Plants are said to show open growth because:
Explanation: Indeterminate growth continues due to persistent meristem activity.
15. Primary growth contributes mainly to:
Explanation: Apical meristems drive elongation growth.
16. Secondary growth contributes mainly to:
Explanation: Lateral meristems cause increase in girth.
17. Cell enlargement in plants is strongly linked to:
Explanation: Turgor-driven expansion follows loosening of the cell wall.
18. Which pair is correctly matched?
Explanation: Meristems are the main sites of active mitosis.
19. Which statement is correct?
Explanation: Genes, hormones, light, water, and nutrients all affect development.
20. The strongest summary of growth basics is:
Explanation: This captures the conceptual foundation of the chapter.
21. Revision Booster 1. Recheck this Plant Growth and Development concept with a fresh option order. Plant growth is generally defined as:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Growth involves permanent increase produced by cell division and enlargement.
22. Revision Booster 2. Recheck this Plant Growth and Development concept with a fresh option order. The region of active cell division in plants is the:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Meristems produce new cells for plant growth.
23. Revision Booster 3. Recheck this Plant Growth and Development concept with a fresh option order. A typical growth curve of plant organs is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Growth often shows lag, log, decelerating, and plateau phases.
24. Revision Booster 4. Recheck this Plant Growth and Development concept with a fresh option order. The phase immediately after cell division in growing root is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Cells increase rapidly in size after being formed.
25. Revision Booster 5. Recheck this Plant Growth and Development concept with a fresh option order. Cells in the maturation region mainly:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Maturation is associated with specialization.
26. The first plant hormone discovered was:
Explanation: Auxin was identified through experiments on phototropic responses.
27. IAA is the common natural form of:
Explanation: Indole-3-acetic acid is a principal natural auxin.
28. Auxin is mainly associated with:
Explanation: Auxin promotes elongation particularly in shoots.
29. Apical dominance is mainly due to:
Explanation: Auxin from the terminal bud suppresses lateral bud growth.
30. Removal of apical bud often promotes lateral branching because:
Explanation: Lateral buds grow when the inhibitory auxin source is removed.
31. Cytokinins are especially known for promoting:
Explanation: Their name reflects their role in cytokinesis.
32. Cytokinins are often synthesized in:
Explanation: They are commonly produced in roots and transported upward.
33. A key effect of cytokinin in leaves is:
Explanation: Cytokinins help maintain chlorophyll and protein synthesis.
34. Gibberellins are classically associated with:
Explanation: They promote internode elongation and bolting.
35. Bolting in rosette plants is promoted by:
Explanation: GA can induce rapid stem elongation before flowering.
36. Gibberellins help in malting industry because they:
Explanation: GA stimulates alpha-amylase production in aleurone cells.
37. Ethylene is unique among plant hormones because it is:
Explanation: Ethylene diffuses readily as a gas.
38. Fruit ripening in many climacteric fruits is promoted by:
Explanation: Ethylene accelerates ripening changes in climacteric fruits.
39. Ethylene commonly promotes:
Explanation: It is strongly associated with aging and shedding responses.
40. Abscisic acid is often called a:
Explanation: ABA accumulates during stress and helps the plant cope.
41. ABA helps plants survive drought chiefly by promoting:
Explanation: Closing stomata reduces water loss during water stress.
42. Seed dormancy is commonly associated with:
Explanation: ABA helps maintain dormancy and prevent premature germination.
43. Which pair is correctly matched?
Explanation: The other effects are matched to different hormones.
44. Which statement is correct?
Explanation: Most developmental responses depend on hormone balance.
45. The strongest summary of hormones is:
Explanation: The chapter emphasizes coordinated hormonal regulation rather than isolated actions.
46. Revision Booster 1. Recheck this Plant Growth and Development concept with a fresh option order. The first plant hormone discovered was:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Auxin was identified through experiments on phototropic responses.
47. Revision Booster 2. Recheck this Plant Growth and Development concept with a fresh option order. IAA is the common natural form of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Indole-3-acetic acid is a principal natural auxin.
48. Revision Booster 3. Recheck this Plant Growth and Development concept with a fresh option order. Auxin is mainly associated with:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Auxin promotes elongation particularly in shoots.
49. Revision Booster 4. Recheck this Plant Growth and Development concept with a fresh option order. Apical dominance is mainly due to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Auxin from the terminal bud suppresses lateral bud growth.
50. Revision Booster 5. Recheck this Plant Growth and Development concept with a fresh option order. Removal of apical bud often promotes lateral branching because:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Lateral buds grow when the inhibitory auxin source is removed.
51. A directional growth movement in response to a stimulus is called:
Explanation: Tropic movements depend on the direction of the stimulus.
52. Growth towards light is called:
Explanation: Shoot tips usually bend toward unilateral light.
53. Primary roots usually show:
Explanation: Roots grow in the direction of gravity.
54. Growth of roots towards moisture is:
Explanation: Roots respond to water availability in soil.
55. Coiling of tendrils around a support is:
Explanation: The growth response is triggered by touch.
56. Nastic movements differ from tropic movements because they are:
Explanation: Nastic movements depend on stimulus intensity, not direction.
57. Opening and closing of flowers due to light intensity is commonly described as:
Explanation: It is a non-directional response to light.
58. Leaf folding in Mimosa pudica when touched is an example of:
Explanation: The response is rapid and independent of direction.
59. Tropic movements are usually caused by:
Explanation: Unequal growth leads to bending.
60. In phototropism of shoots, bending is explained by:
Explanation: Greater elongation on the shaded side bends the shoot toward light.
61. Sleep movements of leaves are often classified as:
Explanation: These are nastic movements associated with day-night cycles.
62. Many nastic movements occur due to changes in:
Explanation: Pulvinus-based movements often depend on changes in turgidity.
63. Pollen tube growth towards ovule due to chemical signals is:
Explanation: The direction is guided by a chemical stimulus.
64. Shoots generally show:
Explanation: Shoots grow upward and toward light under normal conditions.
65. Which pair is correctly matched?
Explanation: Touch-directed growth of tendrils is a classic example of thigmotropism.
66. Which statement is correct?
Explanation: This distinguishes many nastic responses from tropic bending.
67. The region in roots that perceives gravity is mainly the:
Explanation: Statolith-containing cells in the root cap help sense gravity.
68. A movement that helps a plant organ orient toward useful stimulus is generally:
Explanation: Plant movements help optimize light capture, support, water uptake, or reproduction.
69. The broadest summary is:
Explanation: The chapter highlights plants as responsive organisms despite being rooted.
70. The strongest overview of plant movements is:
Explanation: This integrates tropic and nastic responses in one framework.
71. Revision Booster 1. Recheck this Plant Growth and Development concept with a fresh option order. A directional growth movement in response to a stimulus is called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Tropic movements depend on the direction of the stimulus.
72. Revision Booster 2. Recheck this Plant Growth and Development concept with a fresh option order. Growth towards light is called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Shoot tips usually bend toward unilateral light.
73. Revision Booster 3. Recheck this Plant Growth and Development concept with a fresh option order. Primary roots usually show:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Roots grow in the direction of gravity.
74. Revision Booster 4. Recheck this Plant Growth and Development concept with a fresh option order. Growth of roots towards moisture is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Roots respond to water availability in soil.
75. Revision Booster 5. Recheck this Plant Growth and Development concept with a fresh option order. Coiling of tendrils around a support is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. The growth response is triggered by touch.
76. Photoperiodism refers to plant response to:
Explanation: Flowering in many plants depends on photoperiod.
77. Short-day plants flower when day length is:
Explanation: They require a longer uninterrupted night.
78. Long-day plants flower when day length is:
Explanation: They need longer daylight or shorter nights.
79. Day-neutral plants flower:
Explanation: Their flowering is relatively independent of day length.
80. In photoperiodic flowering, the effective stimulus is often perceived by:
Explanation: Leaves perceive light duration and produce flowering stimulus.
81. The hypothetical flowering signal transported from leaves is called:
Explanation: Florigen is the classical term for transmissible flowering stimulus.
82. Red and far-red light effects in flowering studies led to interest in:
Explanation: Phytochrome is a photoreceptor involved in light responses.
83. A short-day plant fails to flower if during its critical dark period it receives:
Explanation: Night interruption can inhibit flowering in short-day plants.
84. Vernalization means promotion of flowering by:
Explanation: Some plants require exposure to cold before flowering.
85. Vernalization is often effective in:
Explanation: Actively dividing regions respond strongly to cold treatment.
86. A practical significance of vernalization is that it can:
Explanation: Cold treatment can make some crops flower earlier.
87. Which pair is correctly matched?
Explanation: The other options mismatch terms and functions.
88. Plants requiring vernalization but later exposed to gibberellin may:
Explanation: Gibberellins can substitute for cold treatment in certain plants.
89. The concept behind photoperiodism emphasizes that plants measure:
Explanation: Night length is crucial in many photoperiodic responses.
90. A biennial plant commonly flowers in the second season because of a need for:
Explanation: Many biennials need winter cold before flowering.
91. Wheat, cabbage, and sugar beet are common examples discussed in context of:
Explanation: These crops often illustrate the cold requirement concept.
92. Which statement is correct?
Explanation: Signal perception and response occur in different regions.
93. Which statement is correct?
Explanation: They are classic external cues that modulate reproductive transition.
94. The transition from vegetative to reproductive phase in plants is called:
Explanation: This shift is governed by developmental and environmental cues.
95. The strongest summary of flowering control is:
Explanation: This unifies photoperiodism, vernalization, and hormonal control.
96. Revision Booster 1. Recheck this Plant Growth and Development concept with a fresh option order. Photoperiodism refers to plant response to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Flowering in many plants depends on photoperiod.
97. Revision Booster 2. Recheck this Plant Growth and Development concept with a fresh option order. Short-day plants flower when day length is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. They require a longer uninterrupted night.
98. Revision Booster 3. Recheck this Plant Growth and Development concept with a fresh option order. Long-day plants flower when day length is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. They need longer daylight or shorter nights.
99. Revision Booster 4. Recheck this Plant Growth and Development concept with a fresh option order. Day-neutral plants flower:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Their flowering is relatively independent of day length.
100. Revision Booster 5. Recheck this Plant Growth and Development concept with a fresh option order. In photoperiodic flowering, the effective stimulus is often perceived by:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Leaves perceive light duration and produce flowering stimulus.
101. Seed dormancy is a condition in which a viable seed:
Explanation: Dormancy prevents germination until specific requirements are met.
102. ABA is commonly associated with:
Explanation: ABA helps prevent premature germination.
103. A hormone that promotes germination is often:
Explanation: GA can break dormancy and stimulate hydrolytic enzymes.
104. Senescence refers to:
Explanation: Senescence is the progressive deterioration preceding death of cells or organs.
105. Leaf senescence is commonly associated with:
Explanation: Nutrients are often mobilized from older leaves to younger tissues.
106. Natural shedding of leaves, flowers, or fruits is called:
Explanation: Specialized abscission zones separate organs from the plant.
107. Ethylene generally promotes:
Explanation: Ethylene is strongly associated with aging and shedding responses.
108. Breaking dormancy is often followed by:
Explanation: Dormancy removal allows renewed developmental activity.
109. The sequence of plant life stages generally moves from juvenile to mature to:
Explanation: The plant or organ eventually enters an aging stage.
110. Parthenocarpic fruits develop:
Explanation: Auxin and gibberellin can induce parthenocarpy in some cases.
111. A gardener pruning the shoot tip to encourage bushiness is exploiting:
Explanation: Removing the apical source of auxin promotes lateral bud growth.
112. Application of auxin-like compounds can help in:
Explanation: Synthetic auxins have several agricultural uses.
113. Cytokinin application is useful in tissue culture because it:
Explanation: Auxin-cytokinin balance is important in tissue culture morphogenesis.
114. Ethylene is commercially used to:
Explanation: Ethylene and ethephon are used to synchronize fruit ripening.
115. Which pair is correctly matched?
Explanation: ABA acts prominently in water-stress responses.
116. Which statement is correct?
Explanation: The chapter repeatedly emphasizes integrated control.
117. The term plasticity in plant development means:
Explanation: Plants can alter development based on environment and internal signals.
118. Heterophylly is often quoted as an example of:
Explanation: Leaf form changes with developmental stage or environment.
119. The most complete statement is:
Explanation: This integrates plasticity, hormone action, and environmental control.
120. The strongest summary of Plant Growth and Development is:
Explanation: This is the best one-line integration of the chapter.
121. Revision Booster 1. Recheck this Plant Growth and Development concept with a fresh option order. Seed dormancy is a condition in which a viable seed:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Dormancy prevents germination until specific requirements are met.
122. Revision Booster 2. Recheck this Plant Growth and Development concept with a fresh option order. ABA is commonly associated with:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. ABA helps prevent premature germination.
123. Revision Booster 3. Recheck this Plant Growth and Development concept with a fresh option order. A hormone that promotes germination is often:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. GA can break dormancy and stimulate hydrolytic enzymes.
124. Revision Booster 4. Recheck this Plant Growth and Development concept with a fresh option order. Senescence refers to:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Senescence is the progressive deterioration preceding death of cells or organs.
125. Revision Booster 5. Recheck this Plant Growth and Development concept with a fresh option order. Leaf senescence is commonly associated with:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Nutrients are often mobilized from older leaves to younger tissues.