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In an experiment, Euglena was put in a petri dish. One side of the petri dish was illuminated and the other kept dark as shown...

      

In an experiment, Euglena was put in a petri dish. One side of the petri dish was illuminated and the other kept dark as shown below.
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a) Name this type of response.
b) State the significance of this type of response in an organism.
c) Other than light, outline other two factors that may cause change of position in Euglena and state the respective type of response.
d) If the above experiment was repeated using a young potted seedling, name the type of response which will be observed.
e) Explain the behavior of the seedling after 3 days.

  

Answers


sharon
a) Phototaxis;
b) Expose the organism to light so that it can photosynthesis;
c) - chemicals – chemotoxis;
- temperature – thermotoxis;
d) Phototropism;
e) - seedling shoot tip bends towards source of illumination / light;
- auxin migrates to the darker side;
Causing rapid growth in the darker side hence a curvature;
sharon kalunda answered the question on September 17, 2019 at 08:28


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