A)an extinct "bird-like" dinosaur. B)an insect-eating bird that is rare in the United States but somewhat common in South America. C)the most primitive of the living birds. D)a primitive therapsid from which birds eventually evolved. E)a hoax made to resemble an intermediate between reptiles and birds.
Where would you locate the Supracoracoideus and pectoralis muscles of a bird?
A)Under its tail feathers B)In the neck controlling the voice box C)In the legs,anchoring a bird's feet D)In the breast,where they control upstroke and downstroke of the wing E)In the wing itself,running along the wing bones