Biology 9700: TRANSPORT IN PLANTS Topical Past Paper Questions

Stomata have daily rhythms of opening and closing. Stomatal aperture width and the concentration of potassium ions in guard cells were measured in the leaves of basil plants, Ocimum basilicum. The basil plants were grown in conditions of natural light, with maximum temperature an…

(a) State and explain why the same leaf of a plant can be described as a source or as a sink, depending on the stage of maturity (age) of the leaf. [2] (b) Fig. 6.1 lists seven types of plant cell found in leaves. Fig. 6.1 Match the correct type of cell from the list in Fig. 6.1…

(a) Fig. 3.1 is a photomicrograph showing part of a transverse section through the root of an iris, Iris germanica. Irises are herbaceous monocotyledons. These plants have the same transport tissues as herbaceous dicotyledons, but the transport tissues are distributed differently…