Fern (Dryopteris filix-mas) prothallus

Fern (Dryopteris filix-mas) prothallus

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Caption: Fern (Dryopteris filix-mas) prothallus. Light micrograph of a section through the prothallus of a 'male fern', showing the sex organs: the male antheridia (purple) and female archegonia (pink). The prothallus is the gametophyte stage in the life-cycle of a fern. It develops from a germinating spore and usually consists of a number of rhizoids (root-like hairs) and the sex organs. Magnification: x6 when printed 10 centimetres wide.

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Keywords: 1, anatomical, anatomy, antheridia, antheridium, archegonia, archegonium, biological, biology, botanical, botany, cell, cells, dryopteris filix-mas, female, flora, gametophyte, germinating, germination, histological, histology, life stage, life-cycle, light micrograph, light microscope, male, male fern, nature, no-one, nobody, one, organs, part, parts, plant, plants, prothallus, reproductive structure, rhizoid, rhizoids, section, sectioned, sex organ, single, spore, structures, white background, wildlife

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