BOTANY

Detailed explanation-1: -Haploid (1n) spores germinate and undergo mitosis to produce a multicellular gametophyte (1n). Specialized cells of the gametophyte undergo mitosis to produce sperm and egg cells (1n), which combine in fertilization to make a zygote (2n).

Detailed explanation-2: -The sexual reproduction of the moss (bryophyte) life cycle alternates between diploid sporophyte and haploid gametophyte phases. In a nutshell, haploid gametophytes produce haploid gametes, which can be sperm or eggs. When egg and sperm merge, they form a diploid zygote which grows into a diploid sporophyte.

Detailed explanation-3: -In mosses, the dominant stage is the haploid generation (the gametophyte). This means that the green, leafy gametophytic tissue is haploid (has only one set of chromosomes). The gametophyte refers to all organs and tissues that are a part of the haploid generation.

Detailed explanation-4: -Haploid spores germinate and grow into the haploid gametophyte generation. Gametophyte refers to the “gamete-making plant.” This generation produces the gametes (egg and sperm) by mitosis.

Detailed explanation-5: -The most conspicuous stage of moss is the gametophyte: A haploid stage. Male gametophytes produce sperm, which must swim to the female gametophyte. Female gametophytes produce eggs, which are retained in special structures on the female gametophyte. The fertilized egg is a zygote, dependent on the female gametophyte.