1. What effect do gibberellins generally have on flower formation in some dioecious or monoecious plants?
A.
They promote the formation of male flowers
B.
They prevent the formation of all flowers
C.
They promote only root formation
D.
They stop plant growth completely
Correct Answer:
They promote the formation of male flowers
Explanation:
Gibberellins can promote maleness by encouraging the formation of male flowers in certain plants.
2. In some plants, treatment with gibberellin increases the production of which type of flowers?
A.
Male flowers
B.
Female flowers only
C.
Leaf buds
D.
Root buds
Correct Answer:
Male flowers
Explanation:
Gibberellin treatment can increase male flower formation in plants where flower sex is influenced by hormones.
3. Gibberellins are associated with which condition during flower sex expression?
A.
Promotion of male flower formation
B.
Complete suppression of flowering
C.
Formation of underground flowers only
D.
Conversion of flowers into roots
Correct Answer:
Promotion of male flower formation
Explanation:
One recognized effect of gibberellins is the promotion of male flowers in certain plant species.
4. Which plant reproductive feature can be influenced by gibberellin application?
A.
The formation of male flowers
B.
The color of seeds only
C.
The shape of roots only
D.
The number of leaf veins
Correct Answer:
The formation of male flowers
Explanation:
Gibberellins can influence the sex of flowers by favoring male flower formation in suitable plants.
5. If a plant responds to gibberellin by producing more staminate flowers, what has been promoted?
A.
Male flower formation
B.
Female flower formation
C.
Fruit ripening
D.
Seed dormancy
Correct Answer:
Male flower formation
Explanation:
Staminate flowers are male flowers, so an increase in them indicates that gibberellin has promoted male flower formation.
6. In relation to flower sex, gibberellins generally favor which type of flower in certain plants?
A.
Male flowers
B.
Female flowers
C.
Flowers without reproductive organs
D.
Flowers that never open
Correct Answer:
Male flowers
Explanation:
Gibberellins generally favor male flower development in certain plants where hormones regulate flower sex.
7. A farmer wants to increase male flowers in a plant species that responds to gibberellins. Which treatment would be suitable?
A.
Applying gibberellin
B.
Removing all stems
C.
Stopping the plant's water supply permanently
D.
Removing all roots
Correct Answer:
Applying gibberellin
Explanation:
Applying gibberellin can promote male flower formation in plant species that are sensitive to this hormone.
8. What is the main role of gibberellin in male flower formation?
A.
It can induce or promote male flowers
B.
It destroys all floral organs
C.
It changes flowers into leaves
D.
It prevents the formation of stamens
Correct Answer:
It can induce or promote male flowers
Explanation:
Gibberellin can induce or promote the development of male flowers, including flowers with stamens.
9. Which statement about gibberellin and flower sex is correct?
A.
Gibberellin may promote maleness in some plants
B.
Gibberellin always prevents male flowers
C.
Gibberellin affects only seed color
D.
Gibberellin has no role in flower development
Correct Answer:
Gibberellin may promote maleness in some plants
Explanation:
In some plants, gibberellin influences flower sex expression by promoting maleness and increasing male flower formation.
10. An increase in male flowers after hormone treatment most directly shows the effect of gibberellin on which process?
A.
Flower sex expression
B.
Root hair absorption
C.
Leaf fall
D.
Seed dispersal
Correct Answer:
Flower sex expression
Explanation:
The formation of more male flowers reflects gibberellin's effect on flower sex expression.
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