Indusium Sori Sporangium Station 19 Fern Sporangium – Examine a prepared slide of a sporangium under the microscope. Be able to recognize the following structures: sporangium, annulus, lip cells, and spores. Spores What is the name of the heavy walled brownish cells? What is their function? Annulus What is the name of the cells that are at the open ends of the annulus? Fern spores are all a single type but develop into a gametophyte with both sex organs (archegonium and antheridium). What is the term used for this condition? Lip Cells 4. Fern spores are wind disseminated and germinate after being transported to suitably moist habitats. What do they give rise to? Station 20 - The Gametophyte Generation of a Fern The gametophyte generation of a fern a heart-shaped prothallus. Under a dissecting scope, Locate the antheridia, which are usually interspersed among the rhizoids. Locate the archegonia, which are usually located by the apical notch. Be able to recognize the following structures: prothallus, apical notch, archegonia, antheridia, and rhizoids. What do the antheridia produce? What do the archegonia produce? Apical Notch Prothallus What is the function of the rhizoids? Archegonium What eventually grows out of the archegonia? Antheridium Rhizoids Station 21 Prothallus with a growing Sporophyte – a dissecting scope, study a prepared slide of a prothallus with a growing sporophyte. Be able to recognize the following structures: prothallus, foot, root, and leaf. (P 100, Fig. 6.94 & 6.96) Leaf What happens to the gametophyte prothallus after the sporophyte begins to grow? Root
Indusium Sori Sporangium Station 19 – Fern Sporangium Examine a prepared slide of a sporangium under the microscope. Be able to recognize the following structures: sporangium, annulus, lip cells, and spores. Spores What is the name of the heavy walled brownish cells? What is their function? Annulus What is the name of the cells that are at the open ends of the annulus? Fern spores are all a single type but develop into a gametophyte with both sex organs (archegonium and antheridium). What is the term used for this condition? Lip Cells 4. Fern spores are wind disseminated and germinate after being transported to suitably moist habitats. What do they give rise to? Station 20 - The Gametophyte Generation of a Fern The gametophyte generation of a fern a heart-shaped prothallus. Under a dissecting scope, Locate the antheridia, which are usually interspersed among the rhizoids. Locate the archegonia, which are usually located by the apical notch. Be able to recognize the following structures: prothallus, apical notch, archegonia, antheridia, and rhizoids. What do the antheridia produce? What do the archegonia produce? Apical Notch Prothallus What is the function of the rhizoids? Archegonium What eventually grows out of the archegonia? Antheridium Rhizoids Station 21 – Prothallus with a growing Sporophyte a dissecting scope, study a prepared slide of a prothallus with a growing sporophyte. Be able to recognize the following structures: prothallus, foot, root, and leaf. (P 100, Fig. 6.94 & 6.96) Leaf What happens to the gametophyte prothallus after the sporophyte begins to grow? Root