Question

A single pea plant in your kitchen garden reduces pods with viable seeds, but the individual papaya plant does not. Explain.

Answer 1

Hint: Some flower creatures have both male and female arrangements, i.e. it merges both sexes in one structure. On the other hand, some flowers do not possess such kinds of structures. The act of moving pollen grains from the male anther of a flower to the female stigma ultimately leads to pollination among plants.

Complete answer:
The pea plant is hermaphrodite or monoecious; the male and female sex organs are available on the same plant and therefore self-pollination is possible and as a product, seeds can be produced. To cross-pollinate it is required to prepare two different roses that are at a parallel stage of development.
The papaya plant, on the other side, is dioecious; male and female sex organs are present on diverse plants, and to reproduce, cross-pollination is a necessity. As the only single plant is present, there will be no pollinators, so no seed formation occurs.
Most of the scenery plants home gardeners grow either are monoecious or they turn out bisexual flowers, so you do not have to provide them much time in terms of reproduction. With dioecious plants, you have to know what you're dealing with to make sure the females will bear berries or seeds.

Note: Dioecious and monoecious plants in fact have something in common, in that they both possess unisexual flowers. It signifies that each bloom has only male or female reproductive parts. With dioecious plants, the male and female blossoms appear on different plants. With monoecious plants, each plant has essentially both male and female flowers.