An advantage of electron microscopes compared to light microscopes is that electron microscopes

are inexpensive and commonly used in most biology laboratories.
allow you to view living cells, while light microscopes do not.
have higher resolution that allows you to view smaller specimens.
allow you to view the true colors of the specimens being viewed.

What does gradualism and punctuated equilibrium have in common

Amajor source of energy for your body comes from

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas