Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
| 1. | Hydrilla | 2. | Yucca |
| 3. | Banana | 4. | Viola |
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
| 1. | Bee | 2. | Wind |
| 3. | Bat | 4. | Water |
A dioecious flowering plant prevents both:
1. Autogamy and geitonogamy
2. Geitonogamy and xenogamy
3. Cleistogamy and xenogamy
4. Autogamy and xenogamy
| 1. | Exine of pollen grains is made up of sporopollenin |
| 2. | Pollen grains of many species cause severe allergies |
| 3. | Stored pollen in liquid nitrogen can be used in crop breeding programs |
| 4. | Tapetum helps in the dehiscence of anther |
| 1. | connective | 2. | placenta |
| 3. | thalamus or petal | 4. | anther |
Which of the following statements is not correct?
| 1. | Insects that consume pollen or nectar without bringing about pollination are called pollen-nectar robbers. |
| 2. | Pollen germination and pollen tube growth are regulated by chemical compounds of pollen interacting with those of the pistil. |
| 3. | Some reptiles have also been reported as pollinators in some plant species. |
| 4. | Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. |
Filiform apparatus is a characteristic feature of?
1. Generative cell
2. nucellar embryo
3. aleurone cell
4. synergids