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.
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
Evidence of Water on Mars
Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ...
Detonation is a secondary ignition of the air–fuel mixture. It is also called spark knock or ...
The evidence of metabolites from gut microbiota.
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