hey the answer polytechnic traits my friend :)
When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective.
The process of cellular differentiation is a direct result of a differiental
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(sry have to make an answer 20 characters /!:!27837)
Buccinators are muscles in the cheek that help smiling.
Laris oculi are muscles helping close eyelids.
Orbicularis oris is a muscle that helps manipulate the mouth:
the correct answer is D. all the above are muscles that help facial expression.