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Chapter 22.1 Life Cycle And History of Plants. Plant Life Cycle Alternation of Generation Between haploid (N) and diploid (2N) phase Between Gametophyte.

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Presentation on theme: "Chapter 22.1 Life Cycle And History of Plants. Plant Life Cycle Alternation of Generation Between haploid (N) and diploid (2N) phase Between Gametophyte."— Presentation transcript:

1 Chapter 22.1 Life Cycle And History of Plants

2 Plant Life Cycle Alternation of Generation Between haploid (N) and diploid (2N) phase Between Gametophyte (N) and Sporophyte (2N) plants One phase must be dominant The dominant phase changes with the different plant phyla

3 Alternation of Generation Spores (N) Egg (N) Sperm (N) Fertilization Gametophyte plant (N) Sporophyte plant (2N)

4 History of Plants What is the evolutionary relationship between… Bryophytes Pterophytes Gymnosperms Angiosperms

5 History of Plants Aquatic Green Algae Plants

6 History of Plants Aquatic Green Algae Mosses Ferns Cone-bearers Flowering Plants Dry Land Flowers & Fruit Seeds Vascular Tissue SIMPLECOMPLEX

7 Modern Plants 235,000 species (90%) 15,600 (5%) 11,000 (4%) 760 (1%) Flowering Plants Mosses Ferns Cone-bearing


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