question_answer 16)

  A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to (a) Pteridophyta               (b) gymnosperms            (c) monocots                     (d) bryophytes

Answer:

                  (d) Bryophyta is a group of plants which have gametophytic haploid thalloid body. Themotile male gamete are produced in special male reproductive structure called antheridia. These gametes need thin film of water to move and reach to the female reproductive organ called archegonia. Whereas, Pteridophyta, gymnosperm and monocots show division of labour and their body shows higher level of organization.