(a) Parthenocarpy is a phenomenon of formation of fruits without fertilization and these fruits are seedless. [1]
Apomixis is a form of asexual reproduction where seeds are formed without fertilization. [1]
(b) Farmers prefer using apomictic seeds since he can keep using the hybrid seeds to raise new crop year after year and he does not have to buy hybrid seeds every year, thus saving time and money. [1]