oct. 25 Life cycle of flowering plants and pollination

oct. 25 Life cycle of flowering plants and pollination -...

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Life cycle of Flowering plants New things – difference between (know if 2n or n) 1. Presence of ovule inside the ovary. a. Pollen doesn’t land on the ovule 2. how reduced the female gametophyte is a. only 7 cells compared to thousands b. just to make an egg 3. double fertilization a. one to form zygote b. second to form new food tissue the endosperm Pollen (n) Has the tube cell, and the generative cell inside (two cells) The tube cell through meiosis to form microspore form into pollen grains, mitosis for forming the sperm cells after the Mature Male gametophyte has been formed. Female = diploid cell to a female gametophyte with 6 cells inside a big cell that has two nuclei. (that is called the embryo sac or the gametophyte) = 7 cells the six cells on the sides came from a spore, so it means it’s haploid. The big one is diploid the one with two nuclei. The egg cell, is on the bottom and has two of the 6 cells on either side. (the cells on the sides of the egg is called the synergid Micropyle is the opening for the pollen tube to grow through. Pollen tube grows into the synergids. The end grows up and forms two male gametes. o
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This note was uploaded on 04/04/2008 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

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oct. 25 Life cycle of flowering plants and pollination -...

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