Distinguish between unisexual and bisexual flowers giving one example of each. Draw a diagram showing the process of germination of pollen grains on stigma and label the following parts: (i) Female germ cell (ii) Male germ cell (iii) Ovary

The above-given diagram shows the germination of pollen grains on stigma. Unisexual flowers are those which contain either the male part or the female part. For example, pumpkin, papaya, cucumber. Bisexual flowers are those which contain both the male and female reproductive parts, the stamens and carpels both in the same flower. For example, sunflower, mustard, tulip etc.