Chapter 35

Chapter 35 - Chapter 35 Plant Structure, Growth, and...

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Chapter 35 Plant Structure, Growth, and Development 1) The plant body has a hierarchy of organs, tissues, and cells 2) The Three Basic Plant Organs a) Plants draw their nutrients from 2 very different environments: below and above ground b) 3 basic organs i) Roots ii) Stems iii) Leaves c) Organized into the root and shoot system 3) Roots a) An organ that anchors the vascular plant b) Absorbs minerals and water i) Absorption occurs near the root tips ii) Roots hairs increase the surface area of the root c) Stores organic nutrients d) Modified roots i) Prop roots ii) Storage roots iii) “Strangling” aerial roots iv) Buttress roots v) Pneumatophores 4) Stems a) Consists of: i) Nodes: points at which leaves are attached ii) Internodes: segment between nodes iii) Axillary buds: potential to form lateral shoot (ex: branch)
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iv) Terminal bud: located at shoot top, causes elongation of a young shoot 5) Leaves a) The leaf is the main photosynthetic organ of most vascular plants b) Consists of: i) A flattened blade ii) The petiole, which joins the leaf to a mode of the stem c) Simple vs. Compound Leaves i) Simple leaf: a single, undivided blade
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Chapter 35 - Chapter 35 Plant Structure, Growth, and...

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