A scientist runs a chemical analysis of two nerve tissues. Tissue A contains a greater composition of fat and protein than tissue B. What is the identity of the two tissues?
AA = meninges; B = neuron bodies
BA = neuron bodies; B = meninges
CA = gray matter; B = white matter
DA = white matter; B = gray matter
AA = meninges; B = neuron bodies
BA = neuron bodies; B = meninges
CA = gray matter; B = white matter
DA = white matter; B = gray matter