Reference no: EM133228832

Compare a macaque skeleton with a chimpanzee skeleton. Look at the scapulas (shoulder blades) of the two species. Which of the following is true? Then, why might that be?

1. The macaque scapulas are fused together, the chimpanzees are separate. (note: when two bones are "fused" this means they have physically joined to form a single bone).

2. The chimpanzees scapulas are fused with the ribcage. (note: when bones are "fused" this means they have physically joined to form a single bone).

3. The scapula of the macaque extends down the side of the ribcage, while the scapula of the chimpanzee lies on top of their ribcage.

Group of answer choices for why this might occur

A. The chimpanzee scapula helps them use tools.

B. The macaque scapula allows them to run along branches.

C. The macaque scapula helps maintain balance while walking along branches.