Explain in brief the structure of the prothallus of the fern?
The structure of the Prothallus of fern has been defined below: (i) Heart-shaped structure. (ii) Sex organs antheridia and archegonia are present on the lower surface of the prothallus. (iv) Prothallus is produced from meiospore as a gametophyte of fern. (v) Below the sex organs are rhizoids (vi) The sex organs which are Archegonia and antheridia are flask and globose shaped respectively. (vii) Male and female gametes are produced in the antheridia and the archegonia.