This question is unfortunately incomplete. However, the general skull features of <em>H</em><span><em>omo heidelbergensis </em></span>include large brow ridges, a broad, sloping forehead and a rear skull wall that is vertical rather than rounded or sloping.
Some molecule can pass through but others cannot because they are too large to pass through. This is also called selective permeability.
The most important difference between primary and secondary
groups is that, primary groups are being referred to a family in which every
person has while the secondary group is being referred to the society or the
sociology class in which every person partakes to.This group has to do with the relationships that exist
amongst them.
The factors in an experiment are called variables. There are three different types of variables. Independent variable, dependent variable, and controlled variable. The independent variable is the one that changes.
