Marine Biology would be in the agriculture/Natural Resources career cluster, or possibly under the biology/science career cluster.
Biology is the study of life and earth science is the study of the earth.
molecular biology
Not a very clear question, but I will try. Biology is biology. Yes there are many diverse topics in the field of biology, but they are all "united" under the field of biology. If you were looking for a single theory that unites all the disciplines of biology, that would be the theory of evolution... that much has been more eloquently put by T. G. Dobzhansky: http://en.wikipedia.org/wiki/Nothing_in_Biology_Makes_Sense_Except_in_the_Light_of_Evolution
flaccidity is when the cell loses water. these cells are easy to distinguish under a microscope because the cell membrane and contents pull away from the cell wall
There are actually 10 fields: Biology, Physiology, Ethology, Botany, Zoology, Herpetology, Iohthiology, Paleontology, Microbiology, and Biochemistry.
medical
Hospitality & tourism
A disc jockey can fall under the Arts, Audio/Video Technology, & Communications career cluster.
It would be under Professional Sports.
You might be thinking of marine zoology, which is a branch of marine biology. It (marine zoology) deals with the "critters" or creatures or animals in the marine environment. Certainly at the very "end" of the scale of marine creatures are living things that might be either animal or plant in nature. We usually see the more general term marine biologist in use to define someone who works in this area, and then a specialty under that umbrella.
Pediatrician falls under the "Health Science" career cluster. This cluster encompasses careers related to the diagnosis, treatment, and prevention of diseases and disorders in humans.
Business, Management, and Administration
Education and Training
fashion designer career clusters fall under somthing i dont know
wel a career cluster an nfl player could have is mabey the player is traded to a differeant team and does not get paid enough money.
Medical.
Tree surgeons are in agriculture.