can any one help me to solve this question??????? it is too difficult to me!!!!!!!
in an investigation of the mineral requirements of plants, several set-ups like the one shown below were used, each filled with a different nutrient solution. The growth and appearance of the plant in each wet-up were monitored.
(a) After a few days, plants in all the set-ups died, including the one in the control set-up which was filled with a nutrient solution containing all the minerals essential for plant growth. State a possible reason for this and suggest how the design of the set-up can be improved.
(b) why is the beakers wrapped with aluminium foil?
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