The prothallus is generally monoecious as it bears both male and female sex organs i.e. antheridia and archegonia respectively or it may be dioecious if male and female sex organs are present on different plants.

Nature of Fern Prothallus: The prothallus represents the haploid gametophytic generation. It is a multicellular, independent, photosynthetic form that lives for a short duration. The prothallus needs a cool, damp, and shady place to grow. Due to its requirement of water for fertilization, pteridophytes are restricted to narrow geographical regions.

The prothallus is the fern gametophyte. It is a green, photosynthetic structure that is one cell thick, usually heart or kidney shaped, 3–10 mm long and 2–8 mm broad. Prothallus of fern produces male and female gametes which after fertilization give …

Prothallium or prothallus is usually the gametophyte stage in the life cycle. The prothallium develops from a germinating spore. It is a short-lived structure, typically 2-5 millimeters wide, with a number of rhizoids (root-like hairs) growing underneath, and the sex organs: archegonium (female) and antheridium (male).

Prothallus is autotrophic, independent and free-living in nature. The male and female sex organs can develop either on a single prothallus (monoecious) or on a different prothallus (dioecious). Hence, a prothallus is a gametophyte and free-living structure formed in pteridophytes.

The prothallus is monoecious (ferns) or dioecious (Selaginella). It bears sex organs i.e., male antheridia and female archegonia. It bears sex organs i.e., male antheridia and female archegonia. They are present ventrally.

Prothallium, or prothallus is usually the gametophyte stage in the life cycle. The prothallium develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure typically 2-5 millimeters wide, with a number of rhizoids (root-like hairs), growing underneath, and the sex organs: archegonium (female) and antheridium ...

This is the gametophyte stage. The prothallus produces a antheridia andarchegonia. These are exosphoric ...

The spore germinates into gametophyte known as prothallus. Prothallus has archegonia present on the ventral side. Hence, the Prothallus of Dryopteris is a Gametophyte. It bears archegonia on the ventral side. So, the correct answer is 'Gametophyte, ventral'.

In pteridophytes, the spore germinates and develops into a body, called as the prothallus. At maturity, regions of the prothallus develop into small separate sexual organs. Antheridia produces the male sex cells and archegonia produces the female sex cells.