Take classes in the natural sciences and mathematics at the secondary level. While not all students will realize their biological aspirations while in high school, those that do will have an advanced start once at the university level. High-school students can satisfy prerequisites such as algebra, trigonometry, basic biology, chemistry and physics before enrolling in a university. This will save time, money and frustration later on.
Research universities that have respected undergraduate programs in the life sciences. It is not a requirement that you attend the same university for your bachelor's degree, master's degree and doctorate. A number of factors will go into making this decision: tuition, geography, acceptance and specific degree programs. Tuition is an important factor, especially for students without scholarships, as you will have to pay for a four-year undergrad program, possible two-year master's program and a three- to seven-year PhD program. State universities are inexpensive for residents, and usually have well-developed life sciences programs. Acceptance will depend on your secondary grades, community involvement and standardized test scores.
Stand out at the baccalaureate level. Biology PhD programs take into consideration your entire collegiate career. At the University of Washington, admission to the molecular and cellular biology program is based on "past research experience, the level of enthusiasm and detail in letters of recommendation, undergraduate records, performance on standardized tests, the applicant's written statement of purpose, and an ability to discuss research and future goals during an interview." This is standard among most life science PhD programs. Building an impressive resume is the most important thing for gaining acceptance to a PhD program.
Find a PhD program catering to your intended speciality. The field of biology encompasses an endless amount of specific disciplines. A PhD program is intended to specialize students in a specific field. While earning your doctorate degree, you will be expected to conduct a research project on a particular subject, thus becoming an expert in that topic. Careers in biology include, but are not limited to, marine biology, health care, environmental management and research, forensic science and biotechnology.
Complete all requirements for your doctorate program. PhD programs are drawn-out processes that require course work, exams, laboratory work, teaching and a dissertation. Course work will allow students to study their chosen field in-depth. Teaching is usually required of doctorate students, who are assigned to introduction courses such as Biology 101. The dissertation is a student's research project. After completion, it is reviewed by peers in the same field. Each program has its own set of graduation requirements, but these are standard to most biology PhD programs.