克拉克生物学系提供博士学位。该计划集中在生物学的两个广泛领域：分子和细胞生物学以及生态学和进化。鼓励申请人直接联系他们的研究兴趣吸引他们的教师。该系提供课程工作和研究机会，从而获得了生物学哲学博士学位。该系有两个重点突出的领域：分子和细胞生物学或生态学和进化。申请入学的学生必须在生物学方面做充分的准备，并在研究生成绩考试（和国际学生托福）上取得令人满意的成绩。合格的学生可获得学费奖学金和研究与教学助学金。
With a breadth of research areas, Clark's biology doctoral program provides opportunities and flexibility to pursue research that benefits our understanding of the world within a connected community of scholars. Our research areas include molecular and cell biology, and ecology and evolution.<br><br>The program's intimate size allows graduate students to collaborate, build relationships with and receive mentoring from world-class faculty. Close ties across the sciences, including with those enrolled in our biochemistry and molecular biology and chemistry doctoral programs, exposes students to a range of ideas and research outside their interest areas. Graduate students are guaranteed tuition remission and teaching assistantships for five years.<br><br>The biology doctoral program seeks students with strong scientific curiosity, prior independent research experience and the ability to persevere.<br><br>Graduate students are integral to collaboration on research with faculty members in their labs and with fellow graduate students and undergraduates. These opportunities allow students to benefit from our faculty's expertise while gaining experience mentoring and teaching. The close-knit community of students in biology, biochemistry and molecular biology, and chemistry builds collaboration across disciplines both in the lab and in the field, which has led to exciting research.