The answer to this question would be: D)there are a few types of enzymes, but they each perform many types of reactions.
Enzyme is vital for a living since it will speed up the chemical reaction rate. This will help much in making and processing energy. But enzyme works like lock and key, which means that a specific enzyme will help specific reaction.
Independent variable: is the UV light exposure
Control group: people not exposed (sample b)
Dependent variable: skin cancer
Experimental group: (sample A)
Answer:
alveoli
Explanation:
They are the smallest structures in our lungs where capillaries exchange O2 and CO2 in blood.
Observation designed to minimize the effects of variables other than the independent variable.
