Nearly all mammals have seven cervical (neck) vertebrae. This fact implies that:
all mammals have to stretch their necks to obtain food.
predators prefer to eat animals with either six or eight cervical vertebrae.
all mammals descended from a common ancestor.
all animals can turn their heads the same amount.

Question

Nearly all mammals have seven cervical (neck) vertebrae. This fact implies that:
all mammals have to stretch their necks to obtain food.
predators prefer to eat animals with either six or eight cervical vertebrae.
all mammals descended from a common ancestor.
all animals can turn their heads the same amount.

shreehari499 · Answer

all mammals descended from a common ancestor...i think so..:)

anonymous · Answer

Correct!

anonymous · Answer

is it all mammals descended from a common ancestor.