Week 7 Notes
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This 2 page Class Notes was uploaded by Kaeli on Tuesday October 4, 2016. The Class Notes belongs to BIOL 102 001 at University of South Carolina taught by Mihaly Czako in Fall 2016. Since its upload, it has received 5 views.
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Date Created: 10/04/16
Chapter 30 Notes Plant Diversity II Derived traits of seed plants o Reduced gametophytes Gametophytes are protected by the sporophyte Dependent gametophytes Cone bearing plants Seeds develop in cone Called gymnosperm Flowering plants Called angiosperm o Heterospory Male and Female spores o Ovules Gymnosperm Type of egg Cone bearing plants Found in females o Pollen Water unnecessary for fertilization Found in males If cone bearing plant, cones are not as we think they are Smaller, contain pollen instead of ovule o Seeds Survive better than unprotected spores Embryo and nutrients surrounded by protective coat Disperse over wide distances Gymnosperm or angiosperm Contains food stored within it Sporopollenin is incredibly resilient Flowers o Meristem reprogrammed to produce flowers after a certain point o Ovule is in the middle of the flower o Stamens release pollen Pollen is multicellular o Flowering plants feature double fertilization o Some angiosperms rely on other living things for pollenization Bright colors help this Organism by organism basis o Modifications Flowers can be underdeveloped Can lack male/female parts Imperfect flower o Many different species Angiosperm life cycle o Male gametophytes are within pollen o Female gametophyte (embryo sac) develops within the ovule Micropyle is fertilized o Cross pollination between flowers is favored o Double fertilization Pollen tube releases two sperm Forms a zygote and endosperm Diploid nucleus is formed o Divide into triploid tissue o Endosperm o Supports zygote Used up during germination Single nucleus left turns into zygote