Quelpr
1 markTransport Systems

CSEC Biology · January 2020 · Paper 2 · Question 1(a)(v)

An experiment was carried out to determine the effect of relative humidity (RH) on the rate of transpiration. The results are presented in Table 1.

A farmer observed that his plants wilted during the day but recovered at night. Suggest to the farmer ONE reason for this occurrence.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 1(a)(i)Briefly describe the process of transpiration in plants. Your description must include the names of TWO of the organs involved in transpiration.[4 marks]
  2. 1(a)(ii)Use the grid on page 5 to draw a graph of the results.[9 marks]
  3. 1(a)(iii)Using the results from Table 1, state how the rate of transpiration changes as the relative humidity changes.[1 mark]
  4. 1(a)(iv)Suggest TWO ways by which the results given in Table 1 support your answer in (a)(iii).[2 marks]
  5. 1(b)(i)Suggest TWO ways in which the animal transport system and the plant transport system are different.[4 marks]
  6. 1(b)(ii)Differentiate between the transport needs of a unicellular animal and a multicellular animal.[2 marks]
  7. 1(b)(iii)Both plants and animals need to store food. With reference to ONE storage site in animals, explain why food storage is important.[2 marks]

More practice: the rest of this paper · more Transport Systems questions · all CSEC Biology past papers