Please help me with these 2 ?!

Skulls of (1) modern gorilla, (2) australopithecus afarensis, (3) homo erectus, (4) homo neanderthalensis, (5) homo sapiens based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ? (2 points)

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256