#4.4.1a
the control of flowering in plants
To include the role of vernalisation and phytochrome in the timing of flowering.
#4.4.1b
adaptations of flowers for pollination
To include adaptations of both wind-pollinated flowers (e.g. cereals) and insect-pollinated flowers (e.g. legumes).
PAG2
#4.4.1c
fertilisation and seed formation
To include the growth of the pollen tube, the formation of the embryo and the formation of the endosperm (in outline only).
PAG2
#4.4.1d
(i) the germination of seeds
(ii) investigations into the factors affecting germination
To include the role of gibberellin as a cell signalling molecule.
#4.4.1e
the importance of cereals as staple foods
To include a consideration of the global use of rice, maize and wheat, and issues relating to food security and sustainability.