... the thirteenth century A B C D 90 Au bones have an exterior layer, termed the cortex, that is smooth, dense, continuous, and _ (A) of varying thickness (B) varied thickness (C) its thickness ... substance called protoplasm a All living things consist of b Although all living things that consist of c All living things consisting of d In all living things consisting of 239 A newspaper's ... substance called protoplasm a All living things consist of b Although all living things that consist of c All living things consisting of d In all living things consisting of 420 A newspaper's...