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edexcel AS biology experiments

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T.Q:
 i need these experiments for the Edexcel AS Biology unit 1

1.Describe how the effect of caffeine on heart rate in Daphnia can be investigated practically, and discuss whether there are ethical issues in the use of invertebrates.

2.Describe how to investigate the vitamin C content of food and drink.

3.Describe how membrane structure can be investigated practically, eg by the effect of alcohol concentration or temperature on membrane permeability.

4.Describe how enzyme concentrations can affect the rates of reactions and how this can be investigated practically by measuring the initial rate of reaction.

plz anybody help
thanx in advance :)

vanibharutham:
have u carried out these experiments in school?

T.Q:
i have found the first experiment

help me with the others plz

T.Q:
more expermints

T.Q:
more expermints

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