enters leaves via stomata; light Xylem tissue is is absorbed by chlorophyll in composed of hollow leaves; dissolved sugars are tubes strengthened transported from the leaves in with lignin. the phloem to other parts of Phloem tissue the plant. transports dissolved sugars from the leaves to other parts of the plant. The movement of food through phloem is called translocation. Phloem cells have pores in their end walls for movement of cell sap. 4.1.3.3 Active transport. Define the term 0.5 Recap diffusion and osmosis. Investigate the effect of ‘active transport’. Compare them with active oxygen availability on Active transport transport. Produce a the growth of plants. involves the movement Describe where active comparison table. (Could be amended to of a substance against transport occurs in humans investigate need for a concentration and plants and what is Introduce active transport as nitrate and magnesium gradient and requires transported. absorption against the ions, links with 4.3.3.1). energy from concentration gradient. Explain why active transport Observe results in later respiration. Discuss when this might be requires energy. lessons. useful. 4.1.3.3 Mineral ions can be Use of a absorbed by active Research where active transport into plant transport occurs in plants and
Xylem tissue is composed of hollow tubes strengthened with lignin. Phloem tissue transports dissolved sugars from the leaves to other parts of the plant. The movement of food through phloem is called translocation. Phloem cells have pores in their end walls for movement of cell sap. enters leaves via stomata; light is absorbed by chlorophyll in leaves; dissolved sugars are transported from the leaves in the phloem to other parts of the plant. 4.1.3.3 4.1.3.3 Active transport. Active transport involves the movement of a substance against a concentration gradient and requires energy from respiration. Mineral ions can be absorbed by active transport into plant Define the term ‘active transport’. Describe where active transport occurs in humans and plants and what is transported. Explain why active transport requires energy. 0.5 Recap diffusion and osmosis. Compare them with active transport. Produce a comparison table. Introduce active transport as absorption against the concentration gradient. Discuss when this might be useful. Research where active transport occurs in plants and Investigate the effect of oxygen availability on the growth of plants. (Could be amended to investigate need for nitrate and magnesium ions, links with 4.3.3.1). Observe results in later lessons. Use of a
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