Chapter 28

Chapter 28 - Phylum Ginkophyta Ginkgo Biloba Only surviving...

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Chapter 28 (The Plant Kingdom: Seed Plants) Two Groups of Seed Plants Gymnosperms Seeds are totally exposed or borne on the scales of cone Ovary wall does not surround the ovules Angiosperms Flowering plants Produce seeds within a fruit (a mature ovary) Gymnosperms Are vascular plants Unlike bryophytes Produce seeds Unlike bryophytes and ferns Produce wind-borne pollen grains Unlike ferns and other seedless vascular plants Conifers (Phylum Coniferophyta) Largest phylum of gymnosperms Woody plants that bear needles (leaves that are usually evergreen) Produce seeds in cones Most are monoecious Have male and female reproductive parts in separate cones on same plant. Cycads (Phylum Cycadophyta) Palm-like or fern-like in appearance Are Dioecious Have male and female reproductive structures on separate plants But reproduce with pollen and seeds
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Unformatted text preview: Phylum Ginkophyta Ginkgo Biloba Only surviving species in phylum Deciduous, dioecious tree Female ginkgo produces fleshy seeds directly on branches. Flowering Plants Angiosperms Vascular plants that produce flowers and seeds enclosed within a fruit Most diverse and successful plant group Reproduction Flowering plants reproduce sexually by forming flowers After double fertilization, seeds form within fruits Wind, water, insects, animals transfer pollen grains. Vascular Structures Efficient water-conducting vessel elements in xylem Efficient carbohydrate-conductive sieve tube elements in phloem Evolution Flowering plants probably descended from gymnosperms with specialized features Leaves with broad, expanded blades. Closed carpels. Flowering plants likely arose only once....
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Chapter 28 - Phylum Ginkophyta Ginkgo Biloba Only surviving...

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