HORTICULTURE

Detailed explanation-1: -Land plants evolved a dominant diploid sporophyte generation. This was adaptive because diploid individuals are less likely to suffer harmful effects of mutations. They have two copies of each gene, so if a mutation occurs in one gene, they have a backup copy.

Detailed explanation-2: -Over the course of evolution, the gametophyte stage has become progressively reduced. Thus, the gametophyte stage is dominant in the more primitive (nonvascular) plants (bryophytes), whereas the sporophyte is the dominant phase in the life cycle of higher (i.e., vascular) plants.

Detailed explanation-3: -In mosses, the haploid gametophyte generation is dominant, whereas in vascular plants (ferns, gymnosperms, and angiosperms), the diploid sporophyte is the prevalent generation.

Detailed explanation-4: -The diploid sporophyte results from the fusion of two gametes.