1. Which plant hormone is commonly used to enhance sugarcane yield by increasing stem length?
A.
Gibberellin
B.
Auxin
C.
Cytokinin
D.
Abscisic acid
Correct Answer:
Gibberellin
Explanation:
Gibberellin enhances sugarcane yield mainly by promoting the elongation of the stem.
2. What is the main effect of gibberellin application on sugarcane plants?
A.
Reduction in stem length
B.
Increase in stem length
C.
Complete stoppage of growth
D.
Decrease in internode length
Correct Answer:
Increase in stem length
Explanation:
Gibberellin promotes stem elongation in sugarcane, which contributes to greater crop yield.
3. Gibberellin increases sugarcane yield primarily by promoting the elongation of which plant part?
A.
Root hairs
B.
Leaves only
C.
Stem
D.
Flowers
Correct Answer:
Stem
Explanation:
The stem is the main part whose elongation is stimulated by gibberellin in sugarcane.
4. Why is gibberellin sprayed on sugarcane crops?
A.
To increase stem length and yield
B.
To stop stem growth
C.
To reduce the number of internodes
D.
To prevent sugarcane from developing stems
Correct Answer:
To increase stem length and yield
Explanation:
Gibberellin spray promotes stem elongation, helping to increase the yield of sugarcane.
5. The increase in sugarcane yield after gibberellin treatment is mainly associated with longer:
A.
Stems
B.
Roots
C.
Flowers
D.
Seed coats
Correct Answer:
Stems
Explanation:
Gibberellin-treated sugarcane develops longer stems, which is linked with enhanced yield.
6. Which statement correctly describes the use of gibberellin in sugarcane cultivation?
A.
It promotes stem elongation and improves yield.
B.
It prevents all vegetative growth.
C.
It shortens the sugarcane stem.
D.
It reduces the productive growth of sugarcane.
Correct Answer:
It promotes stem elongation and improves yield.
Explanation:
The agricultural application of gibberellin in sugarcane is useful because it increases stem length and yield.
7. A farmer wants to increase the length of sugarcane stems. Which treatment would be most suitable?
A.
Gibberellin application
B.
Abscisic acid application
C.
Removal of all growing tissues
D.
Application of a growth inhibitor
Correct Answer:
Gibberellin application
Explanation:
Gibberellin is a growth-promoting hormone that stimulates stem elongation in sugarcane.
8. How does gibberellin help in sugarcane yield enhancement?
A.
By increasing stem elongation
B.
By causing early leaf fall
C.
By reducing plant height
D.
By stopping cell growth in the stem
Correct Answer:
By increasing stem elongation
Explanation:
Gibberellin increases the length of the sugarcane stem, thereby helping to enhance crop yield.
9. Which result is expected when sugarcane is treated with gibberellin?
A.
Shorter stems and lower yield
B.
Longer stems and higher yield
C.
No stem development
D.
Complete loss of vegetative growth
Correct Answer:
Longer stems and higher yield
Explanation:
Gibberellin treatment promotes stem elongation in sugarcane, which can result in increased yield.
10. In sugarcane, gibberellin is considered useful because it promotes:
A.
Stem growth
B.
Stem drying
C.
Root decay
D.
Leaf removal
Correct Answer:
Stem growth
Explanation:
Gibberellin promotes the growth and elongation of sugarcane stems, supporting greater yield.
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