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Plant Growth And Development Mock Tests

18 questions available

Plant Growth And Development Mock Test 1

Questions: 18

Sample Questions

Class 11 Biology
Which of the following plant growth regulators is primarily responsible for inducing seed dormancy and closing stomata during water stress?
A Auxin
B Gibberellin
C Abscisic acid (ABA)
D Cytokinin
Class 11 Biology
Which plant growth regulator is primarily responsible for the phenomenon of bolting, where the internodes between leaves elongate rapidly before flowering?
A Abscisic acid (ABA)
B Gibberellin (GA)
C Ethylene
D Cytokinin
Class 11 Biology
Plant growth exhibits a characteristic pattern over the life cycle. Which growth curve pattern do most living organisms in natural conditions generally follow?
A Linear growth
B Arithmetic growth
C Sigmoid (S-shaped) curve
D Exponential growth without limitation
Class 11 Biology
Abscisic acid (ABA) is often described as a "stress hormone" in plants because it:
A Helps plants cope with water stress by inducing stomatal closure and promoting seed dormancy during unfavorable conditions
B Promotes rapid growth during stressful conditions
C Increases photosynthesis during drought
D Deletes damaged DNA during stress
Class 12 Biology
Abscisic acid (ABA) is often called the "stress hormone" of plants because it:
A Induces stomatal closure during water stress, inhibits growth to conserve resources, and promotes seed dormancy during adverse conditions
B Stimulates rapid cell elongation in shoots and root elongation in response to mechanical stress
C Promotes leaf senescence and abscission by activating cell wall-digesting enzymes in the abscission zone
D Enhances photosynthetic rate by increasing Rubisco activity under high-temperature stress
Class 11 Biology
Plant growth exhibits a characteristic pattern over time. Which type of growth curve represents the pattern of growth in natural populations and most organisms?
A Linear growth curve
B Hyperbolic growth curve
C Sigmoid (S-shaped) growth curve
D Exponential decline curve
Class 11 Biology
Vernalization is the promotion of flowering by exposure to low temperatures. Which plant hormone is involved in mediating the vernalization response?
A Gibberellin
B Florigen (FT protein)
C Abscisic acid
D Ethylene
Class 11 Biology
Ethylene, unlike other plant hormones, is a:
A Gaseous plant hormone that promotes fruit ripening and senescence
B A liquid hormone produced in roots
C A solid hormone found in cell walls
D A hormone that only inhibits growth

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