(Q).
Answer the following question given this paragraph: Q: Composed largely of the polysaccharide chitin, the exoskeleton provides an effective barrier defense against most what? Choices: - parasites - white blood cells - vaccines - pathogens A:
(A).
pathogens

(Q).
Answer the following question given this paragraph: Q: Urea and carbon dioxide are molecules with how many carbon atoms? Choices: - even number - four - two - one A:
(A).
one

(Q).
Answer the following question given this paragraph: Q: Psip can be positive or negative relative to what kind of pressure? Choices: - inertia - magnetic - manometric - atmospheric A:
(A).
atmospheric