What is a defining characteristic of a graduated cylinder?

A graduated cylinder is specifically designed to accurately measure liquid volumes, and its defining characteristic is the graduated markings along its length. These markings allow users to read the precise volume of liquid contained within the cylinder. The scale typically includes a series of lines that indicate specific volumes, making it easy to measure liquids accurately. This feature distinguishes graduated cylinders from other laboratory equipment, as it is primarily used for measuring, rather than mixing or manipulating objects.

The other options describe characteristics of different tools or devices. For example, having an open-end jaw pertains to tools like calipers or grips used in other applications, while the application of torque is relevant to wrenches. Additionally, the design for gripping rounded surfaces would apply to objects like pliers or certain types of grips. These functionalities do not relate to the primary purpose of a graduated cylinder, which is measurement, underscoring why the graduated markings are integral to its definition.