What is a scalpel primarily used for?

A scalpel is primarily used in dissection and surgery due to its design and functionality. It features a sharp blade that allows for precise cuts, which is essential in surgical procedures for incising skin, tissues, and organs with accuracy. This precision is crucial in both medical surgeries and biological dissections, where detailed and careful manipulation of tissues is required.

In contrast, the other options represent tools or instruments designed for different functions. Measuring liquid volumes would typically involve pipettes or graduated cylinders, while holding samples securely is the role of forceps or clamps. Culturing microorganisms is accomplished using Petri dishes or culture flasks, which provide the appropriate environment for growth. Each of these tasks requires specialized equipment tailored to their specific purposes, reinforcing the scalpel's unique role in the context of surgery and dissection.