AP BIOLOGY

Detailed explanation-1: -Solution : The bryophytes have evolved a life which comprises two phases-gametophyte and sporophytes. The gametophyte (haploid) is concerned with sexual reproduction and constitutes the most conspicous. Nutritionally independent phase in the life cycle.

Detailed explanation-2: -In bryophytes the long-lived and conspicuous generation is the gametophyte, while in vascular plants it is the sporophyte. Structures resembling stems, roots, and leaves are found on the gametophore of bryophytes, while these structures are found on the sporophytes in the vascular plants.

Detailed explanation-3: -Complete answer: In bryophytes, when the two generations are morphologically different, then the type of alternation of generations is known as heteromorphic. The haploid phase (n) is known as the gametophyte or sexual generation.

Detailed explanation-4: -Alternation of generations means that plants alternate between two different life stages, or generations, in their life cycle; a haploid stage called gametophyte and a diploid stage called sporophyte.