24 1 Reproduction in Flowering Plants p 696

24. 1 Reproduction in Flowering Plants p 696

Q: What are flowers? • A: Flowers are reproductive organs that are composed of four different kinds of specialized leaves: sepals, petals, stamen, & carpels

Sepal-encloses the bud before opening. Petal-attract insects. Found inside the sepal.

The Structure of Flowers Male Parts • Stamen-contains anther & filament • Anther-structure on which pollen grains are produced.

Female Parts • Carpel-Innermost part of a flower that produces & shelters the female gametophytes. Contains: • Stigma-Sticky part at the top of style; specialized to capture pollen. • Pistil-Single carpel or several fused carpels; contains the ovary, style, & stigma. • Ovules-Future seeds

Q: How does fertilization in angiosperms differ from fertilization in other plants? • A: The process of fertilization in angiosperms is distinct from that found in other plants. Two fertilization events take place --one produces the zygote and the other a tissue, called endosperm within the seed.

Development of: Male Gametophytes Female Gametophytes

• Pollination mostly by wind &animals • Fertilizationzygote & endosperm.

Pollination & Fertilization • Pollen from the male anther, sticks to the female stigma and goes down to the ovule. • Fertilization occurs on the seed. http: //www. natgeoeducationvideo. c om/film/1133/reproduction-offlowering-plants

• WB pgs 379 -380. Skip #21 -24.