A trend first observed in the evolution of the earliest tetrapods was
a. the appearance of jaws.
b. the appearance of bony vertebrae.
c. feet with digits.
d. the mineralization of the endoskeleton.
e. the amniotic egg.
Answer: c. feet with digits.
A trend first observed in the evolution of the earliest tetrapods was
a. the appearance of jaws.
b. the appearance of bony vertebrae.
c. feet with digits.
d. the mineralization of the endoskeleton.
e. the amniotic egg.
Answer: c. feet with digits.