Could a man with type ab blood be the father of a child with type o blood

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

Which of the following statements about genes and traits is true? a single trait can be controlled by multiple genes. a single gene can control a single trait. a single trait can alter multiple genes. a single gene can influence multiple traits.

Astudent wants to compare the amounts of co2 given off by yeast provided with different amounts of sugar. the student places a balloon over each container to catch the released co2. which observation is a qualitative observation the student can make?