BIO 200 Lecture Notes - Lecture 16: Pollen Tube, Germination, Quinoa
11 Nov 2017
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Document Summary
Clades of angiosperms: archaefructus fruits, herbaceous aquatic shrubs -> male/female (pre-flowers) (no petals, sepals, amborella trichopoda only remaining species in the genus. Flowers: hermaphroditic -> functionally dioecious small flowers. Abominable mystery persists ~ quests for fossils: nymphaeales: diverse groups of angiosperms: chloranthacea + ceratophyllum -> > showy flowers -> no vessel cells (one group of. Angiosperms without) -> route in sediments -> extended leaves leaves photosynthesized -> stomata on one side (only top of leaves) -> well-adapted -> extremely strong: austroballeyales: small group, woody plants. Flowering plants have special adaptions for mating -> bees mating in angiosperms have multiple species -> pollination = mating, not fertilization. Pollination -> germination -> pollen tube grows -> fuses with cells (fertilization) -> without pollination = no fertilization. Abiotic: water: floating pollen, not water soluble, but still germinates -> close together, wind: small, white or pale-green odorless flowers, hanging or standing off plant (reduced petals.
