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Ch 29 Plant Diversity

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Ch 29 Plant Diversity

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    1. Ch 29 – Plant Diversity

    2. Plants evolved from a common ancestor of Charophytes

    3. What are the differences between plants and their algae relatives (In other words, what are the derived traits of plants?) Remember: These traits helped plants adapt to life out of the water

    4. Walled spores (sporopollenin) Sporopollenin is a tough polymer that keeps the plant from drying out.

    5. Spores vs. Seeds spores Seeds Usually haploid Smaller than a seed Usually single celled Have a supply of stored food Contains a zygote (fused sex cells) so is diploid Multicellular layers of tissue

    6. Multicellular Gametangia A specialized structure on the plant that produces gametes Female gametangia: archegonia Male gametangia: antheridia * The gametes will fuse to form an embryo (Key to the term embryophytes which defines plants)

    7. Alternation of generations (Alternation between two generations of multicellular organisms)

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