The answer is letter a) bacteria
A potometer can be used to measure the rate of transpiration that's proportional to water uptake. Transpiration cannot be measured directly as some of the water will be used in photosynthesis.
it is a variable (often denoted by x ) whose variation does not depend on that of another.
The process is called facilitated transport when molecules must join with another molecule, such as proteins, to get through a membrane.
