Name: Cotyledon: The Embryo Feeder
Uploaded: 2019-07-19
Duration: 2 min 36 s
Description: How would you define a cotyledon? This video explains what are cotyledons, what are monocots and dicots and the difference between monocot and dicot plants....

Question

Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

Accepted Answer

Archegonium is the female sex organ which produces the female gametes or eggs. Archegonia are present in the life cycles of bryophytes, pteridophytes, and gymnosperms.

The life cycle of a fern (Dryopteris)

Dryopteris is a common fern with pinnate-compound leaves.

Their main plant-body is sporophytic.

The sporangia are borne on the ventral surfaces of mature leaves.

Each sporangium has spore mother cells, and they undergo meiosis to produce haploid spores.

Upon maturation, these spores dehisce and germinate to give rise to a heart-shaped gametophyte called prothallus.

The prothallus has both male and female sexual parts called antheridia and archegonia, respectively.

The antheridia produce sperms which swim in the water to reach to the archegonia. The archegonia produce the egg.

A zygote is formed as a result of fertilisation. The zygote matures into an embryo, which in turn develops into a new sporophyte. The young plant comes out of the archegonium of the parent gametophyte.

Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

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