University of Arizona
Degree Search Header

Ecology & Evolutionary Biology

« Back to all degrees

Ecology & Evolutionary Biology

Bachelor of Science

Apply Now

The Ecology & Evolutionary Biology major focuses on the history, development, and interaction of Earth's organisms, including plants, animals, and single-celled life forms. Students in this major explore life's diversity in an integrative evolutionary framework, spanning genomes to ecosystems: they study species evolution, the effect of environmental pressures on evolution, patterns of biological diversity, and species interaction within a given ecosystem. The Bachelor of Science degree is designed primarily for students who plan to pursue graduate studies or professional careers in ecology, evolutionary biology, or an allied scientific field.

Major Details

College: College of Science
Admissions Requirements:

No Additional Requirements

Math Required:


    This strand involves skill and facility with calculus. The S-strand begins at one of two calculus options - MATH 124 (Calculus I with Applications) or MATH 125 (Calculus I). Students who successfully complete the S-strand may continue on to MATH 129 (Calculus II), MATH 223 (Vector Calculus), or beyond. Those who choose but are not ready to begin the S-strand will be required to take preparatory work.
Second Language Required:

2 Semesters

  • Scoring the equivalent of second-semester skill level on an entrance or placement examination administered by The University of Arizona.
  • Completion with a C or better of a second semester course at the post-secondary level.
  • An AP (Advanced Placement), IB (International Baccalaureate) or CLEP (College Level Entrance Program) language score determined by the individual language department.
  • In the College of Engineering by a method determined within the College; however, all students in the college must also take a language placement examination on entrance to the University.
2 Semesters
Fees: No
Pre-Major: No

Four-Year Plan

Archived plans are available on Degree Search 2011-2017 for many degree plans. These are sample plans. Please work with your academic advisor for more specific and up-to-date requirements.

Select a year:

UA Course Requirements Units
1st Semester
MATH 122A Functions for Calculus 1
MATH 122B First-Semester Calculus 4
CHEM 151 General Chemistry 4
ENGL 101 First-Year Composition 3
Tier I General Education 3
2nd Semester
MATH 129 Calculus II or MATH 263 Intro to Statistics and Biostatistics 3
CHEM 152 General Chemistry II 4
ECOL 182R Intro Biology II 3
ECOL 182L Intro Lab II 1
ENGL 102 First-Year Composition II 3
3rd Semester
CHEM 241A Organic Chemistry Lecture I 3
CHEM 243A Organic Chemistry Lab I 1
MCB 181R Intro Biology 3
MCB 181L Intro Lab I 1
Second Language (101) 4
Tier I General Education 3
4th Semester
CHEM 241B Organic Chemistry Lecture II 3
CHEM 243B Organic Chemistry Lab II 1
Major elective (Ecology, Evolution & Behavior) 4
Second Language (102) 4
Tier I General Education 3
5th Semester
ECOL 320 Genetics 4
Tier II General Education 3
200 level ECOL course 3
Major Elective (Genetics or Cell Biology) 3
Tier I General Education 3
6th Semester
ECOL 335 Evolutionary Biology 4
Additional Physical Science 3
Major elective (Biology of Organisms) 4
PHYS 102 Intro Physics I 3
PHYS 181 Intro Lab I 1
7th Semester
ECOL 302 Ecology 4
Major elective (Biology of Organisms) 4
PHYS 103 Intro Physics II 3
PHYS 182 Intro Lab II 1
Tier II General Education 3
8th Semester
Major elective (Ecology, Evolution & Behavior) 4
Capstone 3
Major elective (Ecology, Evolution & Behavior) 4
Tier II General Education 3

AZ Transfer Pathways

This page is designed for in-state transfer students who plan to attend the University of Arizona. The information presented lists the most accurate course equivalencies and may not include all possible requirements. Transfer students are strongly encouraged to use this site for reference only and not for self-advising.

Transfer students should work with their community colleges and UA advisors to develop an individualized plan for transfer, and visit

  • All posted Pathways (except for Bachelor of Applied Science Pathways) fulfill an AGEC and most also fulfill an Associate Degree
  • Following a Pathway does not guarantee admission to the UA nor admission to a college/major/program at the UA
  • Use Pathways in consultation with advisors from your community college and the UA
  • Pathways are subject to change at any time

Which college/university do you attend?