Question

blood or saliva should be collected and stored in ______ containers.

a. breathable

b. airtight

c. unbreakable

d. absorbent

Explanation:

To store blood or saliva, they need to be protected from air (to prevent contamination, spoilage, or changes). Airtight containers prevent air from entering, which is essential. Breathable would let air in (bad), unbreakable relates to physical strength (not main storage need here), and absorbent would soak the samples (not desired). So the correct option is b.

Answer:

b. airtight