Answer to Question #328038 in Cell Biology for Magodi

Question

1. Explain the following concepts in relation to plant movements under the following

headings; definition, purpose and stimulus.

a) Gravitropism

b) Phototropism

c) Thirgmorphogenesis

d) Nyctinasty (20 marks)

2. Explain the role of the following compounds in a plant

a) Cutin

b) Suberin

c) Pyrethroids

d) Anthocyanins (8 marks)

3.

i) Give a definition of a plant hormone (2 marks)

ii) Describe the effects of the following major plant hormones (Auxins, Gibberelins,

Cytokinins, Abscisic acid and Ethylene) on the plant.