RHS Year 1 session 3 2011

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RHS Year 1 session 3 2011

  1. 1. RHS Level 2 Certificate Year 1 Week 4 Plant cells and plant tissues
  2. 2. Quiz answers <ul><li>1. (b) </li></ul><ul><li>2. The binomial system. </li></ul><ul><li>3. (c) </li></ul><ul><li>4. (d) </li></ul><ul><li>5. (c) </li></ul><ul><li>6. (c) </li></ul><ul><li>7. (d) </li></ul>8. (d) 9. sylvatica is the species part of the name. 10. Cultivar – man made variety. E.g. Rosa filipes ‘Kiftsgate’.
  3. 3. Learning objectives <ul><li>1. Plant Cells – structure and function </li></ul><ul><li>1.1 Describe the structure of the basic plant cell and state the function of the basic components, </li></ul><ul><li>including the cell wall, cell membrane, nucleus, vacuole, cytoplasm, chloroplasts & mitochondria. </li></ul><ul><li>1.2 State where active cell division is located within the plant (apical and lateral meristems) </li></ul><ul><li>1.3 Define the term: ‘plant tissue’. </li></ul><ul><li>1.4 Describe the basic characteristics and role of the tissues found in flowering plants, identifying protective, meristematic, transport, packing, strengthening, and support functions . </li></ul>
  4. 4. Cells – structure and function <ul><li>Plant cells – internal structure </li></ul><ul><li>Plant cells – function. </li></ul><ul><li>Plant tissues – organisation and differentiation of cells. </li></ul>
  5. 5. Plant cell - structure
  6. 6. Cell components <ul><li>Cell wall – cellulose mesh, reinforced with lignin in cells that do not remain active. </li></ul><ul><li>Cell membrane – holds the living contents of the cell. </li></ul><ul><li>Nucleus – contains chromosomes (DNA) and RNA. </li></ul><ul><li>Cytoplasm – jelly like substance that supports and sustains cell components. </li></ul><ul><li>Plasmodesmata – strands of cytoplasm that biochemically link cells together. </li></ul><ul><li>Vacuole – sac containing dilute sugars, waste products and nutrients. Maintains cell shape. </li></ul>
  7. 7. Cell Organelles <ul><li>Chloroplasts – contain chlorophyll and are the site of photosynthesis </li></ul><ul><li>Mitochondria – the site of respiration (that is the breaking down of carbohydrate to release energy - NOT breathing! ) </li></ul><ul><li>Ribosomes – manufacture proteins for use in the plant. </li></ul>
  8. 8. Growth <ul><li>Growth begins with cell division – known as mitosis . This produces genetically identical daughter cells. </li></ul><ul><li>New cells expand and differentiate into different types of cell. </li></ul><ul><li>Different types of cell are organised into plant tissues to perform different functions. </li></ul>
  9. 9. Meristems – sites of cell division and growth.
  10. 10. How a stem grows.
  11. 11. Plant Tissues <ul><li>Plant tissues – a group of cells of the same type with a common function, e.g. transportation of water and nutrients or strengthening. </li></ul><ul><li>Meristematic tissue is one example. All the cells in the meristem are unspecialised and able to divide by mitosis. </li></ul><ul><li>Other categories of plant tissue include protective, vascular, strengthening and packing tissues. </li></ul><ul><li>All together these make up the parts of the plant and control the plants physiological processes. </li></ul>
  12. 12. xylem phloem sclerenchyma cell parenchyma cells Part of a stem in cross section – showing cell walls only
  13. 13. Learning outcomes <ul><li>1. Plant Cells – structure and function </li></ul><ul><li>1.1 Describe the structure of the basic plant cell and state the function of the basic components including the cell wall, cell membrane, nucleus, vacuole, cytoplasm, chloroplasts & mitochondria. </li></ul><ul><li>1.2 State where active cell division is located within the plant (apical and lateral meristems) </li></ul><ul><li>1.3 Define the term: ‘plant tissue’. </li></ul><ul><li>1.4 Describe the basic characteristics and role of the tissues found in flowering plants, identifying protective, meristematic, transport, packing, strengthening, and support functions . </li></ul>

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