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1 markIrritability and Response

CSEC Biology · May/June 2017 · Paper 2 · Question 1(b)(iii)

Corn seedlings that germinated were placed in a pot and exposed to unidirectional light, as shown in Figure 2.

The students want the seedlings to grow straight towards the ceiling. Suggest how they could manipulate the apparatus to get this result.

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Other parts of this question

  1. 1(a)(i)Write a suitable aim for this experiment.[2 marks]
  2. 1(a)(ii)In which of the tubes, A or B, would germination most likely occur? Give ONE reason for your answer.[2 marks]
  3. 1(a)(iii)State TWO roles that the moisture from the cotton wool plays in the process of germination.[2 marks]
  4. 1(b)(i)What type of movement is shown by the plants in Figure 2?[1 mark]
  5. 1(b)(ii)State a hypothesis that the students could test by using the apparatus and materials shown in Figure 2.[2 marks]
  6. 1(b)(iv)The seedlings shown in Figure 2 use all the nutrients stored in the cotyledons. Discuss the process by which these plants can make more nutrients.[4 marks]
  7. 1(b)(v)Discuss the processes by which the raw materials required for making nutrients reach the leaves of the plant.[4 marks]
  8. 1(c)(i)Starch is the most common carbohydrate that is found in the leaves of green plants. Describe a test that the students could do in the laboratory to investigate…[4 marks]
  9. 1(c)(ii)Name ONE plant organ, other than leaves, where starch may be found.[1 mark]
  10. 1(c)(iii)Instead of starch, animals store complex carbohydrates such as glycogen. Name TWO organs in an animal's body which store glycogen.[2 marks]

More practice: the rest of this paper · more Irritability and Response questions · all CSEC Biology past papers