In an investigation, young plant shoots were exposed to 48hrs of light from above or from one side only. Their growth responses are shown in...

      

In an investigation, young plant shoots were exposed to 48hrs of light from above or from one side only. Their growth responses are shown in the diagrams below.
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i) Name the response shown by the shoots and explain the advantages of this response to the plants.
ii) Account for the growth response of shoot B after 48 hours.

  

Answers


sharon
i) Positive phototropism allows plant shoots to obtain optimum light for photosynthesis 1 mark
ii) Light causes lateral migration of auxins to the darker side; the darker side has a higher auxin concentration than the light
side, cells on the darker side grow and elongate faster causing the curvature towards light;
sharon kalunda answered the question on May 29, 2019 at 09:20


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