BIOL 1130 Lecture Notes - Pollination, Meiosis, Monocotyledon
27 Sep 2013
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Document Summary
Many flowers occurring together in an inflorescence. Peduncle will bear the inflorescence many individual flowers in various arrangements. Each individual flower is born on a pedicel. Arrangement of the pedicels describes the inflorescence. Location of the ovary relative to fertile parts. Monoecious have male and female flower on same plant. Diocious have male and female flowers on separate plants. Life cycles: annual completes in one season ex - corn, biennials takes 2 years to produce a seed ex - carrots, perennials line > 2 years and flower after a certain development has occurred. But flowering process occurs during a single season. Occurs in megasporocyte ovule within the ovary. Megasporocyte 2n ---meiosis----> 4 megaspores (n) Mitosis occurs 3 divisions 8 cells. **picture ** ( polar cells, 2 central cell nuclei, 2 synergids, microphyle) Microspores pollen grains 2 cells: a) tube nucleus, b) generative nucleus. Pollen grain stigma and starts to grow towards the microphyle of the.
