Describe photosynthetic organisms as the main producers of food and therefore biomass
Describe photosynthetic organisms as the main producers of food and therefore biomass
Describe how sucrose is transported around the plant by translocation
Explain how the structure of a leaf is adapted for photosynthesis and gas exchange
Explain the effect of environmental factors on the rate of water uptake by a plant, to include light intensity, air movement and temperature
Demonstrate an understanding of rate calculations for transpiration
Explain how plants are adapted to survive in extreme environments including the effect of leaf size and shape, the cuticle and stomata
Explain how plant hormones control and coordinate plant growth and development, including the role of auxins in phototropisms and gravitropisms
**Describe the commercial uses of auxins, gibberellins and ethene in plants, including:
a) auxins in weedkillers and rooting powders b) gibberellins in germination, fruit and flower formation and the production of seedless fruit c) ethene in fruit ripening**
Describe photosynthesis in plants and algae as an endothermic reaction that uses light energy to react carbon dioxide and water to produce glucose and oxygen
Explain the effect of temperature, light intensity and carbon dioxide concentration as limiting factors on the rate of photosynthesis
Explain the interactions of temperature, light intensity and carbon dioxide concentration in limiting the rate of photosynthesis
Core Practical: Investigate the effect of light intensity on the rate of photosynthesis
Explain how the rate of photosynthesis is directly proportional to light intensity and inversely proportional to the distance from a light source, including the use of the inverse square law calculation
Explain how the structure of the root hair cells is adapted toabsorb water and mineral ions
Explain how the structures of the xylem and phloem are adapted to their function in the plant, including:
a) lignified dead cells in xylem transporting water and minerals through the plant b) living cells in phloem using energy to transport sucrose around the plant
Explain how water and mineral ions are transported through the plant by transpiration, including the structure and function of the stomata