Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the independent variable for this experiment? a. the amount of water b. the height of the plant c. the amount of sunlight d. the amount of soil

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

d. the weight of the book