Vulcan blood is presumed to be green in color , the explanation for this ( first definitely advanced in the installment  Obsession ,  from the original program ) being that the oxiferous ( oxygen-carrying ) protein hemoglobin , in Vulcan blood cells , is chemically based on the element copper , rather than the element iron as is the case with ...
SECONDARY GROUPS The term secondary group has come into use in sociology to describe any group which lacks one or more of the elements that go together to characterize a primary group. In general, a secondary group is composed of individuals who lacks strong emotional ties one another.. (end of quotation) .
Primary groups: people who are emotionally close, know one another well and seek one another's company.he major characteristics of primary and secondary groups are with primary groups they are more close together like in best friends and all. Secondary groups are not that clos â¦ e and not together all the time. 14 people found this useful.