A paleontologist finds a relative complete skeleton but isn't sure if it is an ape fossil or a hominid fossil. Which of the following features would help distinguish between the two choices? a. Position of the opening in the skull for the spinal cord
b. Design of the pelvis
c. Relative length of the hind limbs
d. Position of the eyes

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism