Ct Turner, Numerade Educator

02:28

Biology

In the instructions for the potato lab, you were asked to write a hypothesis and prediction before you started your experiment. WRITE OUT your Hypothesis and your prediction here.
Remember that a hypothesis must include a tentative explanation for what you think will happen in the experiment. The prediction is what evidence, observed or measured, that would support your hypothesis.
Because this is your first time writing your own hypothesis and prediction, here is an example that you've already seen, based on your prelab!
For your hypotheses in prelab, you selected: Iodine and glucose will be able to diffuse across the dialysis tubing membrane, but not starch due to its molecular size. (This explains why!)
You then answered a question asking you what observations you could use to determine diffusion of the different substances. These were your predictions!
For starch vs. iodine, you selected: If only iodine is able to cross the membrane, the solution inside the tubing will look dark purple. (This is what you saw/measured!)
6. Which of the following best describes osmosis in living cells?
Group of answer choices
Water will move passively via osmosis from a hypertonic to a hypotonic solution.
Water will move passively via osmosis from a hypotonic to a hypertonic solution.
Trick question; water doesn't move passively across living membranes; only solutes do.
Water only moves via osmosis when solutions are isotonic.