Exam-style Questions: Plant Growth
-
Fill in the missing words...
Water moves from the soil into the roots by ___(i)___ and then flows steadily up the ___(ii)___. As water is lost from the leaf by ___(iii)___ more water is drawn up through the ___(iv)___ to replace it. The roots have root ___(v)___ to increase their ___(vi)___ and so allows more water to be absorbed.
(Marks available: 6)
Answer outline and marking scheme for question: 1
(i) osmosis;
(ii) xylem;
(iii) transpiration;
(iv) xylem;
(v) hairs;
(vi) surface area.
(Total = 6 marks)
-
There are 3 main nutrients that are good for plants - nitrates, phosphates and potassium.
What are the deficiency symptoms of the 3 nutrients?
(Marks available: 6)
Answer outline and marking scheme for question: 2
Nitrates: Stunted growth and yellow, older leaves;
(2 marks)
Phosphates: Poor roots and purple, younger leaves;
(2 marks)
Potassium: Yellowing leaves with dead spots.
(2 marks)
(Total = 6 marks)