question_answer 24)

  Give an example of plants with (a) haplontic life cycle (b) diplontic life cycle (c) hapiodiplontic life cycle

Answer:

                  (a) Haplontic life cycle It is exhibited by Volvox, Spirogyra and Chlamydomonas. The dominant photosynthetic phase in these plants is gamotophytic phase which develops from a haploid spores after a mitotic cell division of zygote. (b) Diplontic life cycle is found in gymnosperms and angiosperms. The dominant phase is diploid saprophyte plant develop from zygote. (c) Haplodiplontic life cycle It is an intermediate conditions exhibited by bryophytes and Pteridophyta. Here haploid gametophytic stage alternates with diploid saprophytic stage. Haplodiplontic life cycle