Question

ferns and mosses must still be considered marginal terrestrial plants.suggest two reproductive features that both posses which forces this marginal existence?

Answer 1

→ Spore formation is the asexual method of reproduction.

→ The reproduction by spore formation takes place in plants.

→ In spore formation, the parent plant produces hundreds of microscopic reproductive units called ‘spores’. When the spore case of the plant brusts, then the spores spread into air. When there air-born spores land on food ( or soil ) under favourable conditions ( like damp and warm conditions ), they germinate and produce new plants.

→ The spore formation method of asexual reproduction is used by unicellular organisms as well as by multicellular organisms.

→ For example , Bacteria are the unicellular organisms reproduce by spore formation whereas fungi such as Rhizopus ( bread mould ) and Mucor, and non-flowering plants such as { Ferns and mosses }

Fernsandmosses are multicellular organisms which reproduce by spore formation method.

[ => Underlined part is your answer. i.e., Ferns and mosses. ]

✔✔ Hence, it is solved

Answer 2

The two reproductive features that both ferns and mosses posses are spore formation and presence of eggs and sperms sexual reproduction.

Explanation:

• Sexual reproduction in mosses and ferns appear by sperm and eggs. The motile sperm must be able to swim through water to reach and fertilize the eggs, which is why most mosses and ferns live in damp habitats.
• The method of asexual reproduction found in moss and fern is spore formation. The parent plant releases spores into the air for reproduction
• These two factors forces their marginal existence because both needs water and damp habitat and hence can not become purely terrestrial plants.

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