Question

does photosynthesis take place in water melon outer green covering

Accepted Answer

Yes.
The chloroplasts on the skin of a watermelon, together withother types
of organelles -"chromoplasts" take part in the development
of the fruit and seeds.
But they do not perform function of the main producer ofplant sugars
(synthesize too little for self-sufficiency), this is the role of
vegetative organs (stems, leaves).
Scientists are studying how these processes affect onlimiting the size
of the fruit.

Question #26628

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