NEET Biology / AI question bank / NCERT Class 11 / Plant Physiology
Plant Growth and Development: NEET questions with solutions
This chapter tests growth phases and rates, differentiation and dedifferentiation, plasticity, and the five classes of plant growth regulators with their discoverers and effects. NEET marks are lost on mixing the physiological roles of the PGRs and on interpreting absolute versus relative growth rate.
Also called: plant hormones · plant growth regulators · auxin and gibberellin
Questions
10 questions / answers after you pick
- Q1Japanese scientists studying 'foolish seedling' (bakanae) disease of rice, caused by the fungus Gibberella fujikuroi, discovered a plant…
Gibberellins and cytokininsEasySingle correct
- Q2Which plant growth regulator is called the stress hormone because it closes stomata under water deficit and also induces seed dormancy?
Ethylene and abscisic acidEasySingle correct
- Q3Match each plant growth regulator with the scientist or group whose work is linked to its discovery.
Plant growth regulators and their discoveryMediumMatch the following
- Q4Growth can follow different mathematical patterns. Evaluate the statements.
Arithmetic and geometric growthMediumStatement based
- Q5Two leaves A and B have initial areas of 5 cm² and 10 cm². In one week A grows to 10 cm² and B grows to 15 cm². Which statement is correct?
Absolute and relative growth rateMediumSingle correct
- Q6In a dicot stem, the interfascicular cambium and the cork cambium arise from fully differentiated parenchyma cells that regain the capacity…
Differentiation, dedifferentiation and redifferentiationMediumSingle correct
- Q7Plant growth is termed open, in contrast to the determinate growth of most animals. Evaluate the Assertion and Reason.
Growth and why it never stops in plantsMediumAssertion–Reason
- Q8Cotton, coriander and buttercup all show heterophylly (different leaf forms on the same plant), but not for the same reason. Which statement…
Development and plasticityHardSingle correct
- Q9Which plant growth regulator is a gaseous hormone, hastens fruit ripening and promotes the respiratory climacteric in fruits?
Ethylene and abscisic acidEasySingle correct
- Q10In the equation for geometric growth, W₁ = W₀ e^(rt), what do W₀ and r represent?
Arithmetic and geometric growthHardSingle correct
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