BIO 200 Lecture Notes - Lecture 16: Basal Angiosperms, Nymphaeales, Austrobaileyales
21 Oct 2016
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Document Summary
Touring the angiosperms: a fossil angiosperm: archaefructus, the most ancestral extant group: amborella, modern groups, nymphaeales and austrobaileyales, chloranthaceae and ceratophyllum, magnoliids, eudicots, and monocots. Coevolution of plants and pollinators: pollination vs. fertilization, abiotic vs. biotic, abiotic: water and wind, biotic: insects (beetles, bees, butterflies, moths, biotic: birds and bats, plant goal achievement: trap flowers, a case study. Flowers came so suddenly based on fossil records. Where are the missing links/fossil intermediates: the nine clades of angiosperms (focus on the seven in you book, archaefructus. Offer best window into origin of angiosperms. Sister taxa to modern flowering plants: amborella. Thought to represent most ancient living angiosperm. Flowers start out as hermaphroditic (have both sexes) Eventually, only 1 of the sexes develop fully and is fertile in flowers of individual plant. Live in water so no need for vessel cells. Leaves (lily pads) float on water surface to photosynthesize. Flowers above water so that they can be pollinated.
