Question
Fig. 4.1 shows a cross section of part of a stem of buttercup, Ranunculus.
Fig. 4.2 is an outline drawing of one vascular bundle from the stem of Ranunculus.
(a) Draw and label the position of the xylem and the phloem in the outline of the vascular
bundle in Fig. 4.2. [2]
(b) Name the carbohydrate that is transported in the phloem.
(c) Substances transported in the phloem are carried upwards in the stem at some times
of the year and downwards at other times.
Explain why substances are transported in the phloem upwards at one time of the year
and downwards at another.
(d) Define the term transpiration.
(e) The rattan palm is a plant that climbs on rainforest trees to heights of about 40 metres.
Explain how water is moved to the tops of tall plants, such as the rattan palm.
Answer/Explanation
Ans:
