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
Single bull elk are vulnerable to predation by wolves.
A gray squirrel, seven months of age near Mobile, Alabama
What type of errors are these: calling only large dogs a dog and calling a dog a kitty?
Most common symptoms of systemic lupus erythematosus (SLE).
Gray Hair Mouse
Gray Matter vs. White Matter