Santi is walking barefoot through his yard when he steps on a sharp rock. the skin on the bottom of his foot sends
this information through a(n)
to his
v. a(n)
picks up
this information and carries it to an)
, which sends a signal to the muscles in his foot causing his
foot to pull away from the rock.

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.