We have all heard those three words: Reduce, Reuse, and Recycle. Whether the concern is with the rapidly changing landscape, pollution of the Earth, depletion of resources, or global climate change, the are steps we can ALL take to reduce the environmental impact of our existence.

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