A 1.5-kb fragment of DNA is cloned into the EcoRI site of a plasmid vector that is 5.5-kb long. The plasmid vector is then transformed into bacteria. If the plasmid DNA is then extracted from a single bacterial colony and digested with EcoRI, what digestion products will be produced if the plasmid lacks the fragment?

A) one 5.5-kb fragment
B) one 1.5-kb fragment
C) one 7-kb fragment
D)one 1.5-kb fragment

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