Which instrument is used to draw liquids up into a pipet and is circular and squeezed to perform actions?

• A. Pipetting Bulb
• B. Pipette Pump blue
• C. Medicine Dropper
• D. Pipette Filler-Dispenser

Answer: (A)

The main idea is using suction to fill a pipette. A pipetting bulb is a flexible, circular accessory that you squeeze to push air out. When you place the bulb on the top of a pipette and release, the air inside lowers pressure and liquid is drawn up into the pipette. This lets you load the pipette with the exact liquid you need before measuring or transferring it.

The other devices work differently: a blue pipette pump is a more specialized suction tool for certain pipettes and isn’t the simple circular bulb; a medicine dropper uses a bulb to transfer liquids but isn’t specifically designed to fill a pipette; and a pipette filler-dispenser is meant to load pipettes but uses its own mechanism rather than the classic squeeze-and-draw action of a bulb.