Taxism, Tropism and Nastic movements


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Taxism, Tropism and Nastic movements

  1. 1. Po NcE
  2. 2.  Simple response whose direction is determined by the direction of the stimulus. This results in a motile animal responding directly by moving its whole body. + towards a stimulus - away from a stimulus Ex: phototaxis, chemotaxis, geotaxis, magnetotaxis.
  3. 3.  Movement is undirected and random.
  4. 4.  Tomates:  cvW8k&feature=related  Semilla  dr0mA
  5. 5.  The growth of a plant in a certain direction in response to a stimulus. + growth toward a stimulus. _ growth away from a stimulus.
  6. 6.  Mimosa:  yOhUc  Planta carnívora:  7_gg  Girasol:  3ibPU
  7. 7.  Parts of a plant will move slightly in response to a stimulus. Are responses that occur in the same way, regardless of the stimulus. Are usually short-term, reversible changes.
  8. 8.  Name three types of stmuli that affect the growth of plants.  Why is it important that the flowers of a particular species open at the same time.  Mark which one is internal and external and what response makes (muscular or glandular) A- you have a stomach ache and decide to lay down. B- A lion gets hungry and eats a gazelle. C- You see a spider and scream. D- A squirrel sees a cut and runs. E- a bird is thristy and drinks some water.