Gymnosperms

Gymnosperms Belong to the group Phanerogams i.e., seed bearing plants. They have naked seeds (not enclosed within a fruit). They are mainly xerophytes. Have diplontic life cycle. Plant body is the sporophyte & the gametophytic generation is very much reduced. Sporophyte is well differentiated into root, stem & leaves. Roots: …

Bryophyta

Bryophyta Bryophytes are amphibians of the plant kingdom. They occur in damp, shady places. Have a haplodiplontic life cycle. Plant body is the gametophyte. Sporophyte is parasitic on the gametophyte. Plant body is a thallus i.e., not differentiated into root, stem & leaf. Vegetative reproduction is by fragmentation, gemmae & tubers. …

Alternation of Generations

Alteration of Generations Alternation of Generations is also known as metagenesis. In Plants, there are 2 phases of the life-cycle: Gametophyte/sexual phase. Sporophyte/asexual phase The zygote(2n) divides to form the sporophyte(2n) and spores(n) divide to form the gametophyte(n). The sporophyte plant is diploid(2n), it produces spores(n) after meiosis. The gametophyte …