There is some evidence that reptiles called cynodonts may have had whisker-like hairs around their mouths. If true, then what can be properly said of hair?
A) It is a shared derived character of mammals, even if cynodonts continue to be classified as reptiles.
B) It is a shared derived character of the amniote clade, and not of the mammal clade.
C) It is a shared ancestral character of the amniote clade, but only if cynodonts are reclassified as mammals.
D) It is a shared derived character of the mammals, but only if cynodonts are reclassified as mammals.
Some male birds and mammals congregate in communal courting grounds called leks.
Arthroscopic surgery. In this illustration, the knee joint is undergoing surgery with a specialized
Experimental Evidence for Infrared Radiation
Wegener’s Evidence for Continental Drift
Common skin signs are often evidence of an illness or disorder. A wheal is a localized, evanescent ...
Bloodstained evidence.