Which reasons are the best for using only the fine-focus knob under high power?

What claim did thorne make? what evidence supported his claim?

You arrive late to a biological seminar. however, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. immediately, you know that they are talking about a: ]

How does the study of genetic disorders such as pku biologists understand normal alleles?