List and describe the 5 characteristics found in all living things; be able to identify various structures or processes as representative of each characteristic

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Which would be the most useful source of evidence to support mcneill's contention?

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