Here is a clear and simple description of a papaya plant seed:
Papaya Plant Seed – Description
The papaya seed is small, round to oval-shaped, and usually black or dark brown in color. It is coated with a thin layer of gel-like substance when fresh, which surrounds a hard seed coat. Inside, it contains the embryo (baby plant) and stored nutrients for early growth.
Papaya seeds are dicotyledonous, meaning they have two cotyledons (seed leaves) that provide energy to the young plant after germination. The seeds are found inside the fruit of the papaya plant (Carica papaya), which belongs to the Caricaceae family.
These seeds grow into fast-growing, soft-stemmed trees that produce large, sweet, tropical fruits.