1. Both male and female flowers break from the plant and float on the surface of water
2. Only the female flowers break from the plant, while male flowers are brought to the surface by long stalks
3. Only male flowers break from the plant and rise to the surface, while the female flowers are brought to the surface by long pedicels
4. Any of the two types of flowers can break
Only male flowers break from the plant and rise to the surface, while the female flowers are brought to the surface by long pedicels
1. Insect transmitted pollen
2. Water borne pollen and pathogens
3. Wind borne pollen
4. Virus infected pollen
Wind borne pollen
1. Leptotene
2. Zygotene
3. Pachytene
4. Diplotene
Leptotene
1. Outer-secondary parietal layer
2. Inner-secondary parietal layer
3. Both (a) and (b)
4. None of the above
Outer-secondary parietal layer
1. Initiating meiosis in pollen mother cell
2. Designing the external thickening of pollen
3. Providing nutrition to developing pollen
4. No specific embryological function
Designing the external thickening of pollen
1. S-phase
2. G1- phase
3. G2- phase
4. All of the above
S-phase
1. Middle layers
2. Endothecium
3. Epidermis
4. Tapetum
Middle layers
1. Spiral bands
2. Radial bands
3. Annular bands
4. Tangential bands
Radial bands
1. At S phase
2. In G2 period
3. At G1 period
4. Before the beginning
At G1 period
1. Dicot type
2. Basic type
3. Reduced type
4. Monocot type
Monocot type