Download Notes on Plant Reproduction

Notes on Chapter 3/Lesson 2
Plant Reproduction
I. What is Alternation of Generation?
•Plants have two life stages called generation.
•One generation has primarily diploid cells, and the other generation has only haploid
cells.
•Organisms that alternate between diploid and haploid generations have an Alternation of
Generation.
**The diploid generation begins with fertilization. The haploid generation begins with
meiosis.
II. Diploid Generation
•Spores are daughter cells produced from haploid structures.
III. Haploid Generation
•Certain reproductive cells of the haploid generation produce haploid sperm and/or eggs
by mitosis and cell division.
IV. Seedless Plants
•Mosses and Ferns reproduce by spores.
V. Seed Plants
•Flowerless Seed plants are called Gymnosperms.
•Examples are conifers, such as pine trees.
Male and Female cones
•Flowering Seed plants are called Angiosperms.
VI. Structure of a flower
VII. Life Cycle of a flower
VIII. Pollination
1)A flower has a male part called the stamen with haploid pollen grain in its anther.
2)Animals like bees, birds, and butterflies can transfer pollen grains stuck on their bodies
from flower to flower of the same species.
3)Pollen grain lands on the stigma of the female part called the pistil.
4) Pollen tube grows to reach egg cells (ovules) in ovary.
5) Sperm cells are released from the pollen tube and fuses with the ovules and
fertilization will take place.
6) A zygote will form and it will develop into an embryo.
7) The ovules will become seeds and the ovary will become the fruit