B.S. Biology (extended major)

The Bachelor of Science in Biology offers nine advising tracks: Behavior, Botany, Cellular and Molecular Biology, Ecology, Evolution, Fish and Wildlife Management, Physiology, Zoology, Pre-Health Professions.


To earn this degree, complete at least 120 units of coursework, which we describe in the sections that follow:   

Be aware that some courses required for your degree may have prerequisites that you must also take. Check the courses in the appropriate subject.  (You may be able to count these prerequisites toward your liberal studies or general elective credit.)  


Please note that you must complete NAUís diversity requirements by taking two 3-unit courses, one in ethnic diversity and one in global awareness. These courses may be used to meet other requirements within your academic plan if you choose them carefully. Click here for a list of the available diversity courses.


Please note that NAU requires that at least 30 units of the courses you take for your degree must be upper-division courses (those numbered 300 and above).  


Finally, please note that you may be able to use some courses to meet more than one requirement; however, you must still meet the total of at least 120 units to graduate. Contact the Biology Advisement Center for details.  

Major Requirements

For this major, complete at least the following 32-44 units of biology and science support courses.  


or CHM 151, 151L, 152, and 152L (9 units)  

or CHM 235 and 235L (5 units)

or CHM 235, 235L, and 238 (8 units)  

or only MAT 136 (4 units)

or PHY 161, 161L, 262, and 262L (8 units)  

Note: if you choose the PHY 161/262 option, PHY 263 is strongly recommended in addition


Complete at least the following 32 units.  Note that you must have a grade of "C" or better in each course.

BIO 205 and 305W

or BIO 326 and 326LW  

BIO 401C

or BIO 425C and 425L

or BIO 426C and 426L

or BIO 435C

or BIO 444C

or BIO 488C  

any BIO courses, except BIO 100 and 100L and 310 or any BIO recitation (R) courses

up to 3 units of BIO 300

up to 6 units from BIO 408, 485, 497, and 498

up to 6 units from the following biology-related courses:   

ANT 270, 271, 370, 379, 553, and 554  

CHM 238L, 320, 360L, 440, 462, and 560  

CS 486C  

ENV 280, 440, and 440L  

FOR 212, 213, 222, 240, 250, 255, 270, 340, 381, 382, 403, 404, 405, 445, 453, and 504  

GGR 250 and 457  

GLG 101, 107, 201, 225, 304, 530, and 536  

NTS 256, 370, 465, and 470  

PRM 300  

PSY 320, 350, 355, 370, 420, 432, 495, and 670  

STA 471 and 472  

General Electives   

Additional coursework is required, if, after you have met the previously described requirements, you have not yet completed a total of 120 units of credit.  


You may take these remaining courses from any academic area, using these courses to pursue your specific interests and goals. We encourage you to consult with the Biology Advisement Center to select the courses that will be most advantageous to you. (Please note that you may also use prerequisites or transfer credits as electives if they werenít used to meet major, minor, or liberal studies requirements.)  


Click here for information about our Biology undergraduate courses and faculty.