Chapter 36 - - - Egg Megasporocytes diploid ovule 4...

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Egg o Megasporocytes – diploid ovule o 4 Megaspores through Meiosis o 3 die and 1 undergoes mitosis to form the female gametophyte/Embryo Sac (embedded in ovule) o 1 egg, 2 polar nuclei in one cell, 5 other nuclei o Egg and polar nuclei Pollinating Agents o Insects Flowers yellow or blue UV markings that insects can see in the flowers Scented Read and annotate bee crap in the book o Birds Flowers yellow, orange, or red Not as strong of a scent o Bats Flowers wit dusky white petals Scented o Wind Flowers make large amounts of pollen Have smaller petals or no petals No scent or nectar Coevolution o Reciprocal adaptation – 2 species (flowering plant, animal pollinator) form interdependent relationship affecting one another’s evolution Flowers with large, showy petals and scent Bees with hairy bodies that catch pollen grains Woodcock Orchid – mimics a female bees so that male bees will come and mess with it Pollination and Fertilization o Pollination – transfer of pollen grains from anther to stigma o Fertilization – after pollination/fusion of gametes Self pollination – pollination within the same plant
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Chapter 36 - - - Egg Megasporocytes diploid ovule 4...

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