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Use the photographs on plant responses to stimuli to answer the questions that follow. The photograph shows various phenomena. (i) Sate the type of response shown, the...

      

Use the photographs on plant responses to stimuli to answer the questions that follow.
The photograph shows various phenomena.
52820191555.png
(i) Sate the type of response shown, the seedlings in photograph G..
(ii) Explain the mechanism of the response shown in question (i) above.
(iii) Using observable features only compare the seedlings in photograph G and H.
(iv) State the biological phenomenon shown by seedling in photograph H.

  

Answers


sharon
(i) (positive) phototropism.
(ii) Unilateral / unidirectional light causes lateral migration of auxins ; to the darkside; illuminated side therefore has less concentration of auxins than dark side ; Due to high concentration of auxins in the dark side there is
more elongation / faster growth ;causing curvature ; towards light.
52820191600.png
(iv) Etiolation ;
sharon kalunda answered the question on May 28, 2019 at 13:01


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