BIOL 1130 Lecture Notes - Fern, Phloem, Prothallium
27 Sep 2013
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Document Summary
High silica content good for sharpening knives (very abrasive) Have canals in their stems: central canal formed by breakdown of the pith, inner carinal canal h2o conduction, vallecular canal gaseous transport. Condition, elaters are extended, compress when moisture occurs spore drips germinates gametophyte produced. Male antheridia (sperm) & female archegonia (egg) Fertilization occurs zygote formed and then a new sporophyte produced. Leaves megaphyls (not venation typical of higher plants) Have a land gap siphonostile (leaf gap) Formed in clusters normally on the bottom of leaves sori. Sporangia has a ribbed backbone annulus, lip cells on anterior. Annulus loses water contracts, splits lip cells and shoots the spores forward. Will have antheridia + archegonia fertilization.
