Question

what is the purpose of staining biological samples?
a) facilitating sectioning of the sample
b) adding contrast and labeling specific structures
c) ensuring the light can pass through the sample
d) enabling sample collection

Explanation:

Staining in biology uses dyes to add contrast to color - less or transparent biological structures and can label specific structures for better visualization under a microscope. Sectioning is related to sample - preparation techniques like using a microtome, not staining. Ensuring light passes through is about sample thickness and clarity, not staining. Sample collection is a different process from staining.

Answer:

B. Adding contrast and labeling specific structures