Out of many papaya plants growing in your garden, only a few bear fruits. Give reason.

Only certain papaya plants bear fruits due to several key reasons:

1. Unisexual Nature: Papaya plants are unisexual; they exist as either male or female plants.

2. Dioecious Characteristic: These plants are dioecious, meaning that individual plants are either male or female.

3. Male Papaya Plants: The male papaya plants produce only pollen and do not bear any fruits.

4. Female Papaya Plants: The female papaya plants are capable of producing fruits, but only when they have been pollinated by male plants.