Seed and fruit. Seed and fruit, respectively, the characteristic reproductive body of both angiosperms (flowering plants) and gymnosperms (conifers, cycads, and ginkgos) and, in angiosperms, the ovary that encloses it.
Flowering plants are defined as angiosperm. Water melon belong to family of Cucurbitaceae-which is like vine flowering plant. Its edible part is berry.
because atomic number and proton &electron number is same . neutron number is solved as atomic mass minus atomic number ( N=atomic mass - atomic number)
