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4 marksIrritability and Response

CSEC Biology · May/June 2007 · Paper 2 · Question 3(c)

Although plants have no specialized organs of sensitivity such as the eye, they also respond to external stimuli. Explain TWO ways in which the response in plants is different from the response to external stimuli by humans.

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Other parts of this question

  1. 3(a)(i)Identify the stimulus for EACH pupil in Figure 5.[2 marks]
  2. 3(a)(ii)For Pupil II in Figure 5, describe how the response came about.[3 marks]
  3. 3(a)(iii)How are the responses illustrated by the pupils in Figure 5 important to humans?[2 marks]
  4. 3(b)(i)Using arrows, show on Figure 6 where an image that is viewed by this person would normally fall in relation to the retina.[2 marks]
  5. 3(b)(ii)Innovations in treating eye defects include lens replacement. On the diagram below, draw the lens that is likely to correct the defect shown in Figure 6, if…[2 marks]

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