If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be

A. optifocal.
B. parfocal.
C. equifocal.
D. totifocal.


Answer: B

Biology & Microbiology

You might also like to view...

Thermophylic members of the phylum ________ can grow in geothermally heated water or soils that contain elemental sulfur.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Organisms store energy as ____

a. starch only b. glycogen only c. fat only d. sugar e. starch, glycogen or fat

Biology & Microbiology

How does a vesicle form from the cell membrane?

What will be an ideal response?

Biology & Microbiology

Define the term "evaporite"

What will be an ideal response?

Biology & Microbiology