Ch. 32 – Reproduction in Flowering Plants Parts of a Flower 1. Petals – colorful 2. Sepals – usually green and below the petals. 3. Receptacle – cup-like support for the ovary. 4. Male Part Stamen A. Anther – holds the pollen B. Filament – stalk that holds the anther.
5. Female Part Pistil A. Stigma – swollen opening for the pistil. At the top and usually sticky. Why? B. Style – stalk-like portion of the pistil. C. Ovary – bottom portion, usually round. Contains the egg.
Pollination What attracts insects to a plant besides its color? Nectar 2 Types of Pollination 1. Cross-pollination – transfer of pollen from one plant to another plant of the same species. 2. Self-pollination – transfer of pollen within the same plant.
Types of Fruit Grain wheat Pome pear & apple Berry grape, tomato, blueberry Legume peas, soybeans Drupe cherry, peach, stone seeds Aggregate fruit strawberry, raspberry Achene sunflower seed Samara maple, ash, (helicopters) Others Table 32-1 (pg. 635)
Parts of a Seed Seed Coat – outer protection Radical – develops into a primary root. Hypocotyl – grows upward above ground into stems and leaves. Cotyledon – provides food for the seed.
Mitosis – Cell division Vegetative growth What is the male gametophyte called? Antheridium What is the female gametophyte called? Archegonium Mitosis – Cell division Vegetative growth Meiosis – Reduction of division How gametes are produced Egg & sperm are produced by meiosis.
Life Cycle of Angiosperms Microspores – are produced in the male cone, which gives rise to a male gametophyte and eventually it will develop into pollen. Megaspores – are produced in the female cone, that gives rise to the female gametophyte and eventually it into an egg cell (ovule). Pollen (1N) + Ovule (1N) = Embryo (2N) Haploid = 1N Diploid = 2N The embryo (seed) gets its food to grow from the cotyledon. Double fertilization occurs in flowering plants. This is where 1 pollen fertilizes the 1st egg for a zygote and a second pollen fertilizes an 2nd egg for the endosperm.