12/20 is the answer I think. I hope this helps you!!
The following which correctly predicts what would happen if a plant was lacking stomata is the last one : It would lose large quantities of water to the surrounding air. I think so because stomata is placed on the top of the plant, to be more exact - on the leaves, so it's quite logically that the last option is the only correct.
PEA stands for Phenylethyl Alcohol Agar medium. It is a selective solid medium that is used to culture Gram Positive bacteria. In this medium, phenylethyl alcohol is an active ingredient that inhibits the growth of Gram Negative bacteria. It causes leakage in the cell membrane of Gram Negative bacteria. It is also used for the growth of obligate anaerobic bacteria.
The only valid method of measurement is millimeters, so the correct answer is " calculating the length of chicken legs in millimeters
