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2 marksIrritability and Response

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

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

State a hypothesis that the students could test by using the apparatus and materials shown in Figure 2.

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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)(iii)The students want the seedlings to grow straight towards the ceiling. Suggest how they could manipulate the apparatus to get this result.[1 mark]
  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]

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