An elongated tailbone occurs rarely in some newborn children. what does the presence of a tailbone indicate?

a.)that the tail will grow in length as the child grows.
b.)that our early ancestors were tailed primates.
c.)that the child's genome must have undergone mutation.

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.