Q1. Archeologists discover skeletal remains of humanlike animals in Ethiopia. The following data is composed from the bones. There are four individuals. Two skeletons have bone densities 30 percent less than those of the other two skeletons. The skeletons with the lower bone mass have broader front pelvic bones. Within the two groups defined by bone mass, only smaller skeletons have bones with evidence of epiphyseal plates.

Q2. If I had a biosphere of plants and animals and air and I radio labelled the carbon in co2, what path will that carbon take through the biosphere, where does carbon go?