- 1(current)
Q. No.A dicotyledonous plant bears flowers, but never produces fruits and seeds. The most probable cause for the above situation is
| 1. | plant is dioecious and bears only pistillate flowers |
| 2. | plant is dioecious and bears both pistillate and staminate flowers |
| 3. | plant is monoecious — |
| 4. | plant is dioecious and bears only staminate flowers |
Autogamy can occur in a chasmogamous flower if
1. pollen matures before maturity of ovule
2. ovules mature before maturity of pollen
3. both pollen and ovules mature simultaneously
4. both anther and stigma are of equal lengths
| 1. | Cleistogamous flowers always exhibit autogamy |
| 2. | Chasmogamous flowers always exhibit geitonogamy |
| 3. | Cleistogamous flowers exhibit both autogamy geitonogamy |
| 4. | Chasmogamous flowers never exhibit autogamy |
Q. 12 A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by
1. insects
2. water
3. wind
4. animals
Q.13 From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
1. Monoecious plant bearing unisexual flowers.
2. Dioecious plant bearing only male or female flowers.
3. Monoeciousplant with bisexual flowers.
4. Dioecious plant with bisexual flowers.
- 1(current)
Q. No.
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