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How do plants grow
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How do plants grow



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  • 1. How do plants grow?
  • 2. Non-vascular plants- They don’t have real roots. (They just look like roots)- They have parts that look like stems but they are not realstems.- They have leaf like structures, but they are not real leaves. The leaves, stems and roots are not real BECAUSE: They do not have VESSELS.
  • 3. Vascular plants - They have vascular tissue. Tissue (a group of cells with the same function) Cells (Building units) Vascular plants (Can be divided into) Phloem Xylem Transports food Transports waterFrom leaves to all From roots to allparts of the plant parts of plant.
  • 4. Vascular plants include:Tiny duckweed Giant redwood plant. trees.
  • 5. Cactus. Orchids
  • 6. Roots Function of roots:1 Absorb water and nutrients from the soil Hold the plant in2 place.N.B. Xylem in the roots take the water and nutrients to the stem andthen to the leaves.
  • 7. Types of roots 1 Taproots 2 Fibrous roots 3 Prop roots(a) One large strong (a) Thin and (a) Grow above the roots that pushes branching ground. deep into the soil. forming a mat Example:(b) Some taproots below the surface Mangrove trees and also store food. of the ground. corn.Example: (b) The spread outCarrots and beets. and absorb water from a large area. Example: Grass and cactus.
  • 8. Xylem cells Phloem cells Cross section in a root
  • 9. StemFunction of a stem:1 Act as pipelines for transporting water and nutrients between the roots and leaves2 Provide support for the plant.
  • 10. Structure of leavesCuticle(waxy layer) Upperepidermis Chloroplast Contains chlorophyll Vascular (green pigment) bundle Contains xylem that absorbs sun’s energy and phloem vesselsStomata LowerLets in carbon dioxide epidermis and lets out oxygen