Many important questions are formed in competitive exams like NEET and boards from Class 11 Biology Chapter 15. Plant Growth and Developments is the fifteenth chapter in the Class 11 NEET syllabus for Biology. Below, we have provided Important Questions from Class 11 Biology Chapter 15 Plant Growth and Developments for your NEET 2023 preparation. You can check it here for revision purposes.
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Plant Growth and Developments Class 11 NEET Questions and Answers
We’ve compiled a list of essential questions about the Plant Growth and Developments biology class 11 chapter 14 that you should not miss while studying for your NEET Exams.
Plant Growth and Developments MCQ for NEET
The growth curve of meristematic cells at growing tip of a plant and an embryo will be
Naphthalene acetic acid is applied on an apple tree. The tree will produce
Apical bud of a tea plant is plucked and painted with a paste of auxin at the cut portion. It will cause
Chrysanthemum is a short day plant with a critical day length of 15 hrs. Under which of the following condition the plant will flower?
The critical period of a long day plant is 9 hrs. Four potted plants of the same species are exposed with different light periods. Which plants would show flowering after exposure?
Critical photoperiod of plant X is 12 hrs. Now in one set of plants, the night phase is interrupted by red light and in another set of plants night phase is interrupted first by red light and then by far red light. In first condition, plants do not produce flower but in second condition plant produce flower. X is a
Which of the following growth regulator promotes rapid elongation of leaf bases and internodes in deep water rice plant?
_____ inhibits gibberellin mediated amylase formation during germination of cereal grains
Plant Growth and Developments Match the Following Questions for NEET
Match column I with column II.
| Column I | Column II |
|---|---|
| A. IAA | (i) SDP |
| B. Xanthium | (ii) Coconut milk |
| C. Cucumber | (iii) Tryptophan |
| D. Spinach | (iv) LDP |
| E. Cytokinin | (v) Day neutral plant |
A. A-(iii); B-(i); C-(v); D-(iv); E-(ii)
Plant Growth and Developments Assertion and Reason Questions for NEET
In each of the following questions, a statement of Assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Of the statements, pick the correct answer as :
Assertion : Abscisic acid is known as dormin. Reason : Abscisic acid is employed for breaking of seed and bud dormancy.
Assertion : Genetically male plants of Cannabis can be induced to produce female flowers in the presence of gibberellin. Reason : Gibberellin promotes internode elongation just prior to flowering
Assertion : Defoliated seedlings of Xanthium cannot flower even with 12 hours photoperiod. Reason : Photoperiodic stimulus is picked up by the fully developed leaves causing photoperiodic perception.
Assertion : TIBA acts as antiauxin by blocking the transport of auxin. Reason : Auxin initiate rooting in stem cuttings
Assertion : Auxin help overcome the apical dominance. Reason : Apical dominance is the phenomenon in which growing apical bud inhibits growth of lateral buds.
Assertion : Sugarbeet, cabbages, carrots are some of the common biennials. Reason : Biennials are monocarpic plants that normally flower and die in the second season.
Assertion : ABA promotes rooting in stem cuttings of Ivy. Reason : ABA promotes growth by cell division
Assertion : Maximum synthesis of ethylene occurs during climacteric ripening of fruits and tissues undergoing senescence. Reason : Ethylene inhibits transverse growth and stimulates longitudinal growth
Assertion : Response to a PGR may differ from one plant organ to another. Reason : The site of production and the site of action of PGRs may be different.
Plant Growth and Developments Figure-Based Questions for NEET
Refer to the given figure and answer the following questions
(a) Identify A and B in the given figure.
A. Given figure shows embryo development with geometric and arithmetic phases. A represents geometric phase and B represents arithmetic phase.
(b) What is the equation and graphical representation of B?
A. Arithmetic growth is a type of growth in which the growth rate is constant and growth occurs in arithmetic progression. Mathematically it is expressed as
Lt = L0 + rt
Lt = length after time t, L0 – length at the beginning, r = growth rate.
The graphical representation is a linear curve
(c) How is exponential growth achieved by A?
A. In geometric growth every cell divides. Number of cells is small initially so, the initial growth is slow. But as every cell is dividing in first generation, and the process is repeated, there is a rapid growth at exponential rate. It is also called exponential growth.
Preparing for NEET? Don’t forget to check Chapterwise Important Questions–
- The Living World NEET Questions and Answers
- Biological Classification NEET Questions and Answers
- Plant Kingdom NEET Questions and Answers
- Animal Kingdom NEET Questions and Answers
- Electrostatics NEET Questions and Answers
- Morphology of Flowering Plants NEET Questions and Answers
- Anatomy of Flowering Plants NEET Questions and Answers
- Structural Organisation in Animals NEET Questions and Answers
- Cell the Unit of Life NEET Questions and Answers
- Biomolecules NEET Questions and Answers
- Cell Cycle and Cell Division NEET Questions and Answers
- Transport in Plants NEET Questions and Answers
- Mineral Nutrition NEET Questions and Answers
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