What are correct oder of steps to bring an object into focus under high power using a microscope​

Which scientist(s) is/are given credit for making the first recorded observations of microorganisms, such as bacteria and protists, with their microscope?

How does this experiment explain why it is often milder in areas such as coastal maryland while areas such as kansas or iowa have more extremes in temperature

Which of these is not a nucleotide base found in dna?