Hemi-acetals and hemi-ketals are in equilibrium with linear species of monosaccharides, illustrated as Fischer Projections. When reactions between a hemi-acetal or hemi-ketal and a second hydroxyl group occurs, acetals or ketals are formed, which can cause the ring structure of a sugar, illustrated as a Haworth projection, to become unstable. a) true
b) false

Which are observations about the tree on the right ,? check all that apply

According to the loco mass the mass of reactants and products

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