Which combination of items correctly lists components of a standard light microscope?

Which combination of items correctly lists components of a standard light microscope?

• A. Stage, stage clips, coarse and fine adjustment knobs, eyepiece
• B. Nucleus, chloroplasts, mitochondria, cell wall
• C. Liver, spleen, heart, brain
• D. Motors, gears, sensors, circuit board

Answer: (A)

The essential idea is identifying the basic hardware needed to view specimens with a light microscope. A standard light microscope includes a stage to hold the slide, stage clips to secure it, coarse and fine adjustment knobs to bring the specimen into focus, and an eyepiece (ocular lens) to look through. These parts are the core tools you use directly to prepare, focus, and observe slides. The other options show things that aren’t parts of the instrument itself. Cellular components like the nucleus, chloroplasts, mitochondria, and cell wall belong to cells, not to the microscope. Organs like liver, spleen, heart, and brain are whole organs, not microscope parts. The last set—motors, gears, sensors, circuit board—describes machinery or devices more than a basic light microscope, and while some advanced models may include motors, they’re not the standard components you’d list for a basic, non-specialized microscope.

The essential idea is identifying the basic hardware needed to view specimens with a light microscope. A standard light microscope includes a stage to hold the slide, stage clips to secure it, coarse and fine adjustment knobs to bring the specimen into focus, and an eyepiece (ocular lens) to look through. These parts are the core tools you use directly to prepare, focus, and observe slides.

The other options show things that aren’t parts of the instrument itself. Cellular components like the nucleus, chloroplasts, mitochondria, and cell wall belong to cells, not to the microscope. Organs like liver, spleen, heart, and brain are whole organs, not microscope parts. The last set—motors, gears, sensors, circuit board—describes machinery or devices more than a basic light microscope, and while some advanced models may include motors, they’re not the standard components you’d list for a basic, non-specialized microscope.