PART - 1 - Unit I : CH - 2 Biological Classification — BIOLOGY STD 11 Science — Question

Life cycle of plants has two distinct phases-the diploid sporophytic and the haploid gametophytic-that alternate with each other. The lengths of the haploid and diploid phases, and whether these phases are free-living or dependent on others, vary among different groups in plants. Haploid (2n) spores are formed by meiosis division in the zygote (n). These spores germinate and form gametophytes. Gametes (male and female) are formed on the gametophyte which fuse again to form a diploid zygote. Sporophyte develops from zygote. This process is called alternation of generation. Example: Ulothrix and Albugo.