A)Always contain a single cell type.
B)Have acquired characteristics of invasiveness.
C)Are surrounded by an intact basement membrane.
D)Are often described as being in-situ.
E)C and D.

A)Normal → hyperplastic → dysplastic → neoplastic → metastatic
B)Normal → dysplastic → hyperplastic → neoplastic → metastatic
C)Normal → hyperplastic → dysplastic → metastatic → neoplastic
D)Normal → neoplastic → dysplastic → hyperplastic → metastatic
E)None of the above

A)To determine whether the chemicals killed mammalian cells
B)To determine whether the chemicals induced cancer in mammalian cells
C)To detoxify the chemicals prior to assessing their mutagenicity
D)To metabolically activate the chemicals prior to assessing their mutagenicity
E)None of the above