Winged pollen grains are present in:
1 Mustard
2. Cycas
3. Mango
4. Pinus
Pollen grains can be stored for several years in liquid nitrogen having a temperature of:
1. | –120 °C | 2. | –80 °C |
3. | –196 °C | 4. | –160 °C |
1. | Fusion of two male gametes of a pollen tube with two different eggs |
2. | Fusion of one male gamete with two polar nuclei |
3. | Fusion of two male gametes with one egg |
4. | Syngamy and triple fusion |
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 |
The morphological nature of the edible part of coconut is:
1. Cotyledon
2. Endosperm
3. Pericarp
4. Perisperm
Double fertilization is exhibited by:
1. Algae
2. Fungi
3. Angiosperms
4. Gymnosperms
1. | connective | 2. | placenta |
3. | thalamus or petal | 4. | anther |
Transmission tissue is a characteristic feature of:
Male gametophyte with least number of cells is present in:
1. Pteris
2. Funaria
3. Lilium
4. Pinus