Which of the following statements is true?

a. all of these are true
b. pku is a metabolic condition caused by the absence of an enzyme
c. lactose intollerance is caused by a malfunctiong or absent enzyme
d. an acidic environment can change an enzyme's shape and therefor its function

Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage

Wheeled coach ambulance uses an interactive computer program to develop and document its products. what is it called?

Use the list below to answer the question: abnormal behavior criteria: • ? • distressing • dysfunctional to be diagnosed with a disorder, an individual must exhibit behavior that meets three criteria. what term completes the list? a. deviant b. diagnosed c. disturbing d. disabled (i think it’s disturbing but i’m not sure! if you know the answer pls comment and i’ll give brainliest if right)