A biologist studies living organisms and their relationship to the environment. They perform research to gain a better understanding of fundamental life processes or apply that understanding to developing new products or processes. Most specialize in one area of biology, such as zoology (the study of animals) or microbiology (the study of microscopic organisms).
The mathematics required for a biologist includes but is not limited to College Algebra, Geometry, Trigonometry, Calculus I and II, and Statistics.
In order to find the average income of a biologist, please use this link.
For more information about becoming a biologist, the US Bureau of Labor Statistics breaks down the job of a biologist into multiple sections to help better understand the requirements of becoming a biologist.