#2.2.4a
the need for transport systems in multicellular plants
To include references to size, variations in metabolic rate and the significance of surface area to volume ratio.
#2.2.4b
the structure, function and location of vascular tissue in roots, stems and leaves
To include xylem vessels, sieve tube elements and companion cells in the roots, stems and leaves of monocotyledonous crop plants (cereals) and dicotyledonous crop plants (broad-leaved crops e.g. carrots, potatoes).
#2.2.4c
(i) the observation, drawing and annotation of stained sections of plant tissues using a light microscope
PAG1
(ii) the longitudinal and transverse dissection and examination of plant organs to demonstrate the position and structure of vascular tissue
PAG2
#2.2.4d
the entry and transport of water in terrestrial plants
To include details of the pathways taken by water AND the mechanisms of movement, including adhesion, cohesion and the transpiration stream, in terms of water potential.
#2.2.4e
(i) the process of transpiration and the environmental factors that affect the transpiration rate
To include an appreciation that transpiration occurs due to physical processes linked to gaseous exchange in leaves.
(ii) practical investigations to estimate transpiration rates
PAG5
#2.2.4f
the mechanism of translocation
To include translocation in the phloem as an energy-requiring process transporting assimilates, especially sucrose, between sources (e.g. leaves) and harvestable sinks (e.g. roots, stems and seeds) AND details of active loading at the source and removal at the sink