Final answer:
The types of pipettes used to deliver or transfer specified volumes of liquid to prepare reagents include serological pipettes, volumetric pipettes, and graduated pipettes. Therefore, the correct answer is D. All of the above.
Step-by-step explanation:
The types of pipettes used to deliver or transfer specified volumes of liquid to prepare reagents include serological pipettes, volumetric pipettes, and graduated pipettes. Serological pipettes are used when precise volume measurements are not required, while volumetric and graduated pipettes are used for accurate volume measurements.
For example, a serological pipette may be used to transfer a certain amount of liquid to a flask, while a volumetric pipette would be used to accurately measure a specific volume of liquid for a reaction.
Therefore, the correct answer is D. All of the above.