1 Letâs not forget estrogen, progesterone, and testosterone, also known as the minor hormones. 2  Adequate levels of estrogen seem to help in hunger regulation, simulating the soothing âfullâ or satiety effect of serotonin.
Education. To land an entry-level job, zoologists and wildlife biologists need a bachelor's degree in zoology, wildlife biology, ecology, animal science or environmental studies. Key classes include anatomy, wildlife management, cellular biology and ecology.ou donât need certification to become a zoologist or wildlife biologist, but you do need extensive education. Some trade groups offer optional certification for wildlife biologists who want to burnish their credentials.
Marine biologists need at least a bachelor's degree in marine biology, and many continue on to receive master's and doctoral degrees in marine biology, according to the Bureau of Labor Statistics. Marine biologists spend many hours in oceans, lakes and rivers studying plants and animals, in addition to the time spent in the classroom learning about the sciences applicable to marine biology.