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2 marksGrowth

CSEC Biology · January 2015 · Paper 2 · Question 1(d)(iii)

Figure 2 shows the growth of a seedling over eight days.

State TWO factors, other than water, that are required for the germination of the seed shown in Figure 2.

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Other parts of this question

  1. 1(a)(i)Identify the type of reproduction carried out by EACH of the plant organs shown in Figure 1. A: B:[2 marks]
  2. 1(a)(ii)Outline the sequence of events that would take place from pollination to the formation of the seed/fruit from the organ shown in Figure 1B.[3 marks]
  3. 1(b)Describe TWO differences between the outcomes of cell division by mitosis and cell division by meiosis.[4 marks]
  4. 1(c)Deduce the genotypes of the parent plants. Explain your answer with the aid of a genetic diagram.[3 marks]
  5. 1(d)(i)Measure the length of the radicle of the seedling on EACH day and record your measurements in Table 1.[1 mark]
  6. 1(d)(ii)Plot the data in Table 1 on the graph paper below. Put days on the horizontal (x) axis.[4 marks]
  7. 1(d)(iv)Describe an investigation to test the hypothesis, 'Water is needed for the germination of seeds'.[4 marks]
  8. 1(e)Suggest why the cotyledons (seed leaves) become smaller as the primary leaves increase in size.[2 marks]

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