BIOL 1002 Lecture Notes - Lecture 6: Stamen, Double Fertilization, Sporophyte
16 Aug 2019
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Document Summary
Canola (canadian oil low acid): a canadian invention. Canola: derived from rapeseed and classic plant breeding techniques. Herbicide-resistant canola plants produced using transgenic techniques. Flowers, double fertilization, and fruits are unique features of the angiosperm life. Plant life cycles characterized by alternation between multicellular haploid (n) generation and multicellular diploid (2n) generation. Diploid sporophytes (2n) produce spores (n) by meiosis; these grow into haploid gametophytes (n) by mitosis. Gametophytes produce haploid gametes (n), eggs and sperm, by mitosis: fertilization results in diploid zygotes (2n) that divide by mitosis to produce new sporophytes. In angiosperms, the sporophyte is the dominant generation. > gametophytes are reduced in size and depend on the sporophyte for nutrients. The angiosperm life cycle is characterized by three fs : flower, double fertilization and fruits. Flowers are reproductive shoots of angiosperm sporophytes. Flowers made of 4 whorls of modified leaves, the floral organs: sepals, petals, stamens, and carpels.
