BIOL 209 Lecture Notes - Lecture 24: Marchantiopsida, Charales, Archegonium
Document Summary
1n (haploid) is th dominant, main photosynthetic phase it tends to be either leafy or ribbon like. 2n (diploid) sporophyte grows attached to the gametophyte: and the 2n sporophyte depends on the female 1n parent for nutrition. Subapical means almost at the tip but not quite. Streptophytes and land plants like liverwort share chl a and b; starch. Phragmoplast: cytokinesis begins in the middle of the cell and works its way to the periphery. Mosses in phylum bryophyta (not to be mistaken with bryophytes, which are common homes for mosses + liverworts) Bryophyta, mosses: gametophyte leafy, leaves spiral about stem, sporophyte is initially green, green stalk; capsule forms, does(cid:374)(cid:859)t ha(cid:448)e a(cid:374)y lea(cid:448)es, within the capsule that meiosis of occurs and spores form. Characters that evolved in land plants: why care about chara, produces 23. 4% of earths oxygen, comparison provides insight to land plant evolution, contributes to red tides; toxic, responsible for white sands, contributes to production of diatomaceous earth.
