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Unit 8- Plants

Unit 8- Plants. Soil. Complex mixture of Sand, Silt, Clay, Organic matter Types- Sandy- Clay- Loamy-. Essential Plant Nutrients (p 591). Inorganic nutrients plants need besides water and carbon dioxide Nitrogen- part of proteins, nucleic acids, chlorophyll, ATP, (color)

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Unit 8- Plants

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  1. Unit 8- Plants

  2. Soil • Complex mixture of • Sand, Silt, Clay, Organic matter • Types- • Sandy- • Clay- • Loamy-

  3. Essential Plant Nutrients (p 591) • Inorganic nutrients plants need besides water and carbon dioxide • Nitrogen- part of proteins, nucleic acids, chlorophyll, ATP, (color) • Phosphorous- DNA, ATP

  4. Essential Plant Nutrients • Calcium- cell walls and membranes • Potassium– required for stoma opening & closing • Magnesium- part of chlorophyll • Sulfur- part of proteins

  5. Specialized Plant Tissues • Meristematic Tissue- • (p 586) • Plant tissue where cells continuously divide, areas that grow • Apical meristem- • Located at the ends of stems and roots, plants grow taller, roots grow deeper

  6. Specialized Plant Tissues • Lateral Meristems- • Allow roots and stem to grow in diameter • Vascular cambium- • Produces vascular tissues, increases the thickness of stems • Cork cambium- • Forms the outer covering of the stem

  7. Specialized Plant Tissues • Epidermal- (p 584) • Outer layers of leaves, stems, & roots, protects, absorb water • Parenchyma- • Storage, make up most of the roots we eat

  8. Specialized Plant Tissues • Collenchyma- • Cells have thicker walls than Parenchyma • Support regions of a plant • Ex. Celery stalks • Sclerenchyma- • Cells have tough thick cell walls, strengthen, support the plant • Example - hemp fibers for making rope • Example - hard nut and seed shells

  9. Specialized Plant Tissues • Vascular Tissue- • Transports materials • xylem- transports water • phloem- transports food

  10. Roots • Anchor plant and absorb water and nutrients from soil • Taproot- one main primary root • Ex. carrot, radish, dandelion

  11. Roots • Fibrous roots- • Many smaller secondary roots • Ex. grass, rye • Root Hairs • Thin walled, • Increase surface area exposed to soil • Absorb water and nutrients

  12. Roots • Monocot- usually has a ring of xylem and phloem around the central cylinder (stele) (p 589) • Dicot- usually has central column of xylem in central cylinder (stele) with radiating arms (p 589)

  13. Stems • Hold leaves up for photosynthesis and transport materials to and from leaves • Monocot- vascular bundles are scattered through out the stem (p 594) • Dicot- vascular bundles form a ring around the outer edge of the stem (p 594)

  14. Woody Stems (trees) • Tree Rings • Annual rings formed from vascular tissue that grows each year • Age of tree • Weather conditions

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