Question

Describe the heteromorphic alternation of generation with reference to any non seeded vascular plant

Answer 1

In xerophytes, cuticle is heavy, well -developed vascular tissue and mechanical tissue are well -developed and differentiated. In hydrophytes, vascular tissue and mechanical tissue are reduced. The cuticle is either completely absent or if present, it is thin and poorly developed.

Answer 2

The heteromorphic alternation of generation in moss happens in the following steps:

Step 1: Gametophyte generation produces male and female gamete. The antheridium produces male gamete sperm, whereas the Archegonium produces female gamete called eggs.  

Step 2: Mating of “male and female gametes” leads to the fertilization and leads to the development of zygote.

Step 3: The zygote is in diploid condition and gets divided due to mitosis mode of cell division and in turn initiates the development of embryo.  

Step 4: The embryo get matured and leads to the formation of diploid plant body called sporophyte.

Step 5: The sporophyte undergoes meiosis to produce spores.

Step 6: the haploid spores are scattered and every spore experiences mitotic cell division to make a haploid multicellular gametophyte.