Why is it important to center the object you are observing in your field of view before switching to a higher power?

Astructure that is found in a plant cell and not in an animal cell is a ? central vacuole mitochondrion nucleus ribosome

Animals that have thick fur and ae able to store large amounts of body fat live where ?

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources