1. What is bud dormancy?
A.
A temporary period when a bud stops or greatly reduces growth
B.
The permanent death of a bud
C.
The rapid opening of every bud
D.
The formation of roots from a bud
Correct Answer:
A temporary period when a bud stops or greatly reduces growth
Explanation:
Bud dormancy is a temporary condition in which the growth and development of a bud are suspended or greatly reduced.
2. Which plant hormone is commonly associated with the maintenance of bud dormancy?
A.
Auxin
B.
Gibberellin
C.
Abscisic acid
D.
Cytokinin
Correct Answer:
Abscisic acid
Explanation:
Abscisic acid helps maintain bud dormancy by inhibiting growth during unfavorable conditions.
3. During bud dormancy, the growth of the bud is generally:
A.
Very rapid
B.
Reduced or temporarily stopped
C.
Changed into root growth
D.
Unaffected in all conditions
Correct Answer:
Reduced or temporarily stopped
Explanation:
A dormant bud shows little or no visible growth until suitable conditions return.
4. Bud dormancy commonly helps a plant survive:
A.
Favorable growing conditions
B.
Unfavorable seasons or environmental conditions
C.
Continuous sunlight only
D.
Excessive flower production
Correct Answer:
Unfavorable seasons or environmental conditions
Explanation:
Dormancy protects developing buds from unfavorable periods such as winter or drought.
5. What may happen to a dormant bud when suitable conditions return?
A.
It may resume growth
B.
It always dies
C.
It changes into a seed
D.
It loses all living cells
Correct Answer:
It may resume growth
Explanation:
Dormancy is usually reversible, so a bud can begin growing again when environmental conditions become suitable.
6. Which condition can commonly promote dormancy in buds of many plants?
A.
Shortening days and low temperatures
B.
Ideal moisture and warmth
C.
High nutrient availability only
D.
Continuous favorable weather
Correct Answer:
Shortening days and low temperatures
Explanation:
Seasonal signals such as shorter day length and low temperature can help induce or maintain bud dormancy.
7. The main advantage of bud dormancy is that it:
A.
Prevents a bud from growing during unsuitable conditions
B.
Makes the bud grow continuously
C.
Causes immediate fruit ripening
D.
Increases water loss from leaves
Correct Answer:
Prevents a bud from growing during unsuitable conditions
Explanation:
Bud dormancy prevents growth at times when freezing temperatures, drought, or other stresses could damage the developing bud.
8. Abscisic acid maintains bud dormancy mainly by:
A.
Promoting cell division rapidly
B.
Inhibiting growth processes in the bud
C.
Increasing flower opening
D.
Stimulating seed dispersal
Correct Answer:
Inhibiting growth processes in the bud
Explanation:
Abscisic acid acts as a growth inhibitor and helps keep buds inactive during unfavorable conditions.
9. A bud that remains inactive through winter and grows in spring is an example of:
A.
Bud dormancy
B.
Leaf abscission
C.
Phototropism
D.
Fruit ripening
Correct Answer:
Bud dormancy
Explanation:
Seasonal inactivity of a bud during winter followed by growth in spring is a typical example of bud dormancy.
10. Which statement about a dormant bud is correct?
A.
It is necessarily dead
B.
It is living but has greatly reduced growth activity
C.
It cannot respond to environmental changes
D.
It produces flowers continuously
Correct Answer:
It is living but has greatly reduced growth activity
Explanation:
A dormant bud remains alive but temporarily reduces its growth and metabolic activity until conditions improve.
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