Dogs (Canis lupus familiaris) and gray wolves (Canis lupus) can interbreed to produce viable, fertile offspring. These species shared a common ancestor recently (in geologic time) and have a high degree of genetic similarity, although their anatomies vary widely. Judging from this evidence, which two species concepts are most likely to place dogs and wolves together into a single species?
A) ecological and morphological
B) ecological and phylogenetic
C) morphological and phylogenetic
D) biological and morphological
E) biological and phylogenetic
Eastern gray squirrels are born naked with their eyes closed
Cortical Gray Matter in Monozygotic Twins Discordant for Schizophrenia
Gray hair collage
Most common symptoms of systemic lupus erythematosus (SLE).
Medial view of tracts revealed by removing gray matter from a midsagittal section