class notes-3.15

class notes-3.15 - Bio 1006: 3/15/10 Mcbride 210 6pm...

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Bio 1006: 3/15/10 Mcbride 210 6pm Pollination: the process of transfet of pollen from the anthers to the stigma. If the plants are from different flowers, it is from cross pollination Fertilization: fusion of the nucleus of the egg and the pollen, sexual reproduction Pollen: Pollen nuclei, tube nucleus Double fertilization: 1)sperm + ova=zygote, 2) sperm + 2 polar nuclei + 3N=endosperm Vector: an organism that transfers the pollen , allows for a reduced pollen output o Insects- bees, wasps, butterflies, flies, beetles o Birds- hummingbirds o Bats Self Pollination-same flower, pollen-ova Cross pollination: pollen comes from different flowers How do plants attract vector pollinators: showy petals, nectar (combination of sucrose and fructose sugars), excess pollen (pollen baskets on legs), sex (bee orchids mimic female bees), fragrances (helps attract butterflies, bees, with bad rotten smells flies and beetles are attracted) Means of seed dispersal: o Wind- dandelion and milkweed seeds are spread when the wind flows
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class notes-3.15 - Bio 1006: 3/15/10 Mcbride 210 6pm...

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