AP BIOLOGY

Detailed explanation-1: -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 .

Detailed explanation-2: -The sexual phase, called the gametophyte generation, produces gametes, or sex cells, and the asexual phase, or sporophyte generation, produces spores asexually. In terms of chromosomes, the gametophyte is haploid (has a single set of chromosomes), and the sporophyte is diploid (has a double set).

Detailed explanation-3: -Plants alternate between the diploid sporophyte and haploid gametophyte, and between asexual and sexual reproduction. Therefore, the life cycle of plants is known as alternation of generations. The ability of the plants to reproduce sexually and asexually helps them to adapt to different environments.

Detailed explanation-4: -Gametophytes Are the Haploid Stage The gametophyte stage, or generation in the alternation of generations life cycle, is the haploid (n) stage. The gametophyte stage can also be thought of as the sexual stage because it will produce the gametes, or sex cells. This stage only has one set of chromosomes.

Detailed explanation-5: -In plants, the gametophyte generation is one that which begins with a spore that is haploid (n). The spore undergoes series of mitotic divisions to give rise to a gametophyte. A gametophyte is a haploid multicellular plant form.