| describe, with the aid of diagrams and photographs, the external and internal structure of the mammalian heart; |
| explain, with the aid of diagrams, the differences in the thickness of the walls of the different chambers of the heart in terms of their functions; |
Presentation: heart structure
Resources: Heart structure laminate and label
| explain the need for transport systems in multicellular animals in terms of size, level of activity and surface area:volume ratio |
| explain the meaning of the terms single circulatory system and double circulatory system, with reference to the circulatory systems of fish and mammals; |
| explain the meaning of the terms open circulatory system and closed circulatory system, with reference to the circulatory systems of insects and fish; |
Presentation: Transport Systems
Resources: Transport in Animals Booklet
Describe, with the aid of diagrams and photographs, how the leaves of some xerophytes are adapted to reduce water loss by transpiration
Resources: xerophyte exam q Xerophytes Homework Xerophytes Self Study
| Explain translocation as an energy-requiring process transporting assimilates, especially sucrose, between sources (eg leaves) and sinks (eg roots, meristem); |
| describe, with the aid of diagrams, the mechanism of transport in phloem involving active loading at the source and removal at the sink, and the evidence for and against this mechanism |
Presentation: Translocation
Resources: Translocation
| Define the term transpiration |
| Explain why transpiration is a consequence of gaseous exchange; |
| Describe the factors that affect transpiration rate |
| Describe, with the aid of diagrams, how a potometer is used to estimate transpiration rates |
Presentation: factors that affect transpiration
Resources: potomoter
| Define the term transpiration |
| Explain why transpiration is a consequence of gaseous exchange; |
Presentation: Transpiration
Resources: Route Taken by water through a plant for labelling
| Explain, in terms of water potential, the movement of water between plant cells, and between plant cells and their environment. (No calculations involving water potential will be set |
| Describe, with the aid of diagrams, the pathway by which water is transported from the root cortex to the air surrounding the leaves, with reference to the Casparian strip, apoplast pathway, symplast pathway, xylem and the stomata; |
| Explain the mechanism by which water is transported from the root cortex to the air surrounding the leaves, with reference to adhesion, cohesion and the transpiration stream |
Resources: movement of water through root
| Describe, with the aid of diagrams and photographs, the distribution of xylem and phloem tissue in roots, stems and leaves of dicotyledonous plants |
| Describe, with the aid of diagrams and photographs, the structure and function of xylem vessels, sieve tube elements and companion cells |
Presentation: xylem and phloem
Past Paper Questions: xylem and phloem PPQ
| Explain the need for transport systems in multicellular plants in terms of size and surface area:volume ratio; |
| Describe, with the aid of diagrams and photographs, the distribution of xylem and phloem tissue in roots, stems and leaves of dicotyledonous plants |
Resources: plant transport booklet
Presentation: lesson 1 introducing plants
Tre's AS Biology 