Describe the single circulation of a fish
Describe the single circulation of a fish
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Describe the circulatory system as a system of blood vessels with a pump and valves to ensure one-way flow of blood
Describe the circulatory system as a system of blood vessels with a pump and valves to ensure one-way flow of blood
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Explain why some parts of a plant may act as a source and a sink at different times
Explain why some parts of a plant may act as a source and a sink at different times
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Describe: (a) sources as the parts of plants that release sucrose or amino acids (b) sinks as the parts of plants that use or store sucrose or amino acids
Describe: (a) sources as the parts of plants that release sucrose or amino acids (b) sinks as the parts of plants that use or store sucrose or amino acids
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Explain how and why wilting occurs
Explain how and why wilting occurs
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Explain the effects on the rate of transpiration of varying the following factors: temperature, wind speed and humidity
Explain the effects on the rate of transpiration of varying the following factors: temperature, wind speed and humidity
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Explain how water vapour loss is related to: the large internal surface area provided by the interconnecting air spaces between mesophyll cells and the size and number of stomata
Explain how water vapour loss is related to: the large internal surface area provided by the interconnecting air spaces between mesophyll cells and the size and number of stomata
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Investigate and describe the effects of variation of temperature and wind speed on transpiration rate
Investigate and describe the effects of variation of temperature and wind speed on transpiration rate
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State that water evaporates from the surfaces of the mesophyll cells into the air spaces and then diffuses out of the leaves through the stomata as water vapour
State that water evaporates from the surfaces of the mesophyll cells into the air spaces and then diffuses out of the leaves through the stomata as water vapour
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Describe transpiration as the loss of water vapour from leaves
Describe transpiration as the loss of water vapour from leaves
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Explain how using antibiotics only when essential can limit the development of resistant bacteria such as MRSA
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State that some bacteria are resistant to antibiotics which reduces the effectiveness of antibiotics
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Describe the use of antibiotics for the treatment of bacterial infections
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Explain the role of auxin in controlling shoot growth, limited to: (a) auxin is made in the shoot tip (b) auxin diffuses through the plant from the shoot tip (c) auxin is unequally distributed in response to light and gravity (d) auxin stimulates cell elongation
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Explain phototropism and gravitropism of a shoot as examples of the chemical control of plant growth
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Investigate and describe gravitropism and phototropism in shoots and roots