What must a phenylketonuria patient leave out of his or her diet? A. a specific amino acid
B. all carbohydrates
C. all amino acids
D. some specific carbohydrates

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Long term exposure to waves can cause sunburns and skin cancer.

Aplant may open end close its stomata to prevent excess water loss and maintain