On each side of the neck there are the carotid artery and the jugular vein. the carotid artery divides in the head in 2 parts: internal and external carotid.
Different genes control the development of different characteristics of an organism.
The answer is A. Transition
Divorce and changing schools is also considered a transitions.
An enviromental change could trigger a drug abuse for teens because it forced them to adapt (socialize with friends, etc)
Eukaryotes
Hope this helps xox :)
Steel and oil industries were helped greatly by automobile manufacturing. Tourism and was also helped by increased automobile ownership.
