NEETBotanySexual Reproduction in Flowering Plants
In what condition do unisexual flowers prevent self-pollination?
Options
- AWhen both types of flowers are on the same plant
- BWhen both male and female flowers are on different plants
- CWhen the stigma and anther are positioned differently
- DWhen self-incompatibility is present
Correct answer
A. When both types of flowers are on the same plant
Step-by-step solution
Outbreeding Devices: Majority of flowering plants produce hermaphrodite flowers and pollen grains are likely to come in contact with the stigma of the same flower In some other species, the anther and stigma are placed at different positions so that the pollen cannot come in contact with the stigma of the same flower. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the