The mineral-filled space left by an organism in a rock is a:
cast fossil
mold fossil
o...
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Biology, 22.06.2019 09:30
Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true
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Biology, 22.06.2019 13:00
What problem would a person most likely have if her kidney did not work correctly?
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Biology, 22.06.2019 18:30
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
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