Saint Leo University
Saint Leo University
Apply now to Saint Leo University
The bachelors degree in biology at Saint Leo focuses on developing the intellectual and experimental skills required for a career in the sciences.

Many of our graduates are admitted to professional schools of medicine, dentistry and veterinary science, or find employment in government, industry, education and other health-related professions.

As a biology student, you will build a foundation in life and physical sciences, including chemistry and physics, and take in-depth writing and reading-intensive biology courses, in which you will study:
  • The plant kingdom
  • Cell chemistry, structure, functions signaling and cell-to-cell communication
  • Metabolic pathways found in both eukaryotic and prokaryotic cells
  •  The principles of ecology
  • Evolutionary and biochemical principles of genetics

Saint Leo is committed to encouraging original undergraduate research. Biology students take laboratory courses that provide hands-on experience in:
  • Taxonomic studies
  • Microscopy
  • Cell biology technologies
  • Techniques such as chromatography, cell fractionation, electrophoresis, protein purification, spectrophotometry and Western blot analysis
  • Local plant and animal communities
  • The molecular nature of heredity

Your Degree in the
Real World 
Bachelors in Biology Degree Launches Change-Making Careers… read more

Students are also required to design, conduct and present a research project their senior year under the mentorship of a department biologist.

In addition to the bachelors degree in biology, Saint Leo University offers a major in biology with a minor in education, as well as a minor in biology.
Program ComponentsCredit Hours
LINK (General Education and Physical Education)50
Computer Applications
COM 130PC Applications(3)
An introduction to computer applications including basic computer concepts and terminology. Hands-on experience in using the operating system, word processing, spreadsheets, and telecommunications. All students are required to take this course if they cannot demonstrate proficiency by passing the Computer Skills exam. Course fee may apply.
Foundation Courses23-24
CHE 123General Chemistry I(3)
Prerequisites: MAT 128 or higher, or permission of instructor; Corequisites: CHE 123L
This course is required of students majoring in biology, environmental science, and medical technology. It is the first half of a two-part fundamentals course that emphasizes atomic and molecular structure, the periodic law, gas laws, mass and energy relationships, and chemical bonding. Three hours of lecture are scheduled each week. This course is offered in fall and spring semesters. All students registered for this course must also be registered for CHE 123L.
CHE 123LGeneral Chemistry I Laboratory(1)
Prerequisites: MAT 128 or higher, or permission by instructor; Corequisites: CHE 123
This is a laboratory course designed to provide students with hands-on experience in the application of the fundamentals covered in lecture. There is one three-hour laboratory scheduled each week. This course is offered in fall and spring semesters. A course fee may apply. All students registered for this course must also be registered for CHE 123.
CHE 124General Chemistry II(3)
Prerequisites: CHE 123, CHE 123L; Corequisites: CHE 124L
A continuation of CHE 123, this course is required for the biology, environmental science, and medical technology programs. Three hours of lecture are scheduled each week. Coverage includes phases of matter, properties of solutions, reaction kinetics, chemical equilibrium, acids and bases, reaction thermodynamics, electrochemistry, and nuclear chemistry. This course is offered in fall and spring semesters. All students registered for this course must also be registered for CHE 124L.
CHE 124LGeneral Chemistry II Laboratory(1)
Prerequisites: CHE 123, CHE 123L; Corequisites: CHE 124
This laboratory course introduces students to fundamental chemical, separation, and spectroscopic techniques. An introduction to qualitative analysis provides students with additional opportunities to work with unknown substances and determine their composition. There is one three-hour laboratory scheduled each week. This course is offered in fall and spring semesters. A course fee may apply. All students registered for this course must also be registered for CHE 124.
CHE 311Organic Chemistry(3)
Prerequisites: CHE 124, CHE 124L; Corequisites: CHE 311L
This course is required for the biology, environmental science, and medical technology programs. It is the first part of a two-semester sequence that explores the fundamentals of organic chemistry. Coverage topics include evaluation of structure, properties, reactions, and synthesis of saturated and unsaturated hydrocarbons, an introduction to stereochemistry and spectroscopy. Three lectures are scheduled each week. This course is offered in fall semesters. All students registered for this course must also be registered for CHE 311L.
CHE 311LOrganic Chemistry I Laboratory(1)
Prerequisites: CHE 124, CHE 124L; Corequisites: CHE 311
Students are introduced to fundamental techniques used in the synthesis and characterization of organic compounds. Students gain hands-on experience in the application of processes/reactions discussed in lecture. One three-hour laboratory period is scheduled each week. This course is offered in fall semesters. A course fee may apply. All students registered for this course must also be registered for CHE 311.
CHE 312Organic Chemistry II(3)
Prerequisites: CHE 311, CHE 311L; Corequisites: CHE 312L
A continuation of CHE 311, this course is required for biology, environmental science, and medical technology majors. Coverage includes investigating the structure, properties, reactions, synthesis, and spectroscopy of aromatic hydrocarbons, and the functional groups found in organic chemistry. There are three lectures scheduled each week. This course is offered in spring semesters. All students registered for this course must also be registered for CHE 312L.
CHE 312LOrganic Chemistry II Laboratory(1)
Prerequisites: CHE 311, CHE 311L; Corequisites: CHE 312
Laboratory course further investigates the properties and reactions discussed in lecture. Spectroscopic methods commonly used in organic chemistry are used for characterizing and identifying reaction products. Students are also introduced to an overview of functional group identification using organic qualitative analysis. One three-hour laboratory is scheduled each week. This course is offered in spring semesters. A course fee may apply. All students registered for this course must also be registered for CHE 312.
MAT 231Calculus—with Analytic Geometry(4)
Prerequisites: MAT 161;
Topics include limits, derivatives, continuity, applications of derivatives, indeterminate forms, introduction to integrals, and the Fundamental Theorem of Calculus. Offered every semester.
OR MAT 201Introduction to Statistics(3)
Prerequisites: MAT 141 or higher, or mathematics placement ;
Development of the fundamental statistical methods, including graphs, measures of central tendency and variation. Inferential statistics includes a basic review of the concepts of probability, binomial probability, normal distribution, CLT, confidence intervals, hypothesis testing, regression analysis, and correlation. Use of statistical software packages. Applications to business, social science, education, and environmental science. Offered every semester.
PHY 222General Physics II(3)
Prerequisites: PHY 221, PHY 221L; Corequisites: PHY 222L
This is a continuation of PHY 221. This portion of the course covers the fundamental concepts and laws of electricity, magnetism, optics, and modern physics. Three hours of lecture are scheduled each week. All students registered for this course must also be registered for PHY 222L.
PHY 222LGeneral Physics II Laboratory(1)
Prerequisites: PHY 221, PHY 221L; Corequisites: PHY 222
This laboratory course provides students with experience in the application of the fundamental concepts and laws of electricity, magnetism, optics, and modern physics. One three-hour laboratory period is scheduled each week. A course fee may apply. All students registered for this course must also be registered for PHY 222.
Major Requirements30-31
BIO 223Botany(3)
Corequisites: BIO 223L
This is a survey course that covers the entire plant kingdom. It is designed to emphasize the structure, life processes, and evolutionary relationships of the major groups of plants. There are three lectures per week. This course is offered in the spring semester. All students registered for this course must also be registered for BIO 223L.
BIO 223LBotany Laboratory(1)
Corequisites: BIO 223
This laboratory course accompanies BIO 223. It is designed to provide students with hands-on experience in taxonomic studies using the local flora. Students can expect to have both indoor and outdoor laboratory experiences. There is one three-hour laboratory period scheduled each week. This course is offered in the spring semester. A course fee may apply. All students registered for this course must also be registered for BIO 223.
BIO 125Cell Biology(3)
Prerequisites: BIO 130 or BIO 223, BIO 130L or BIO 223L, or departmental permission; Corequisites: BIO 125L
This course is designed to familiarize students with cell chemistry, cell structure, cell functions, cell-to-cell communication, cell signaling, cell reproduction, and inheritance. There are three hours of lectures per week. This course is offered in fall and spring semesters. All students registered for this course must also be registered for BIO 125L.
BIO 125LCell Biology Laboratory(1)
Prerequisites: BIO 130 or BIO 223, BIO 130L or BIO 223L, or departmental permission; Corequisites: BIO 125
This is a laboratory course that will provide students with extensive hands-on experience in microscopy and in laboratory technologies that may include staining, measuring of enzyme activities, spectrophotometry, electrophoresis, cell fractionation, chromatography, and measuring metabolic activity. There is one three-hour laboratory period scheduled each week. This course is offered in fall and spring semesters. A course fee may apply. All students registered for this course must also be registered for BIO 125.
BIO 324Biochemistry(3)
Prerequisites: BIO 125, BIO 125L, CHE 124, CHE 124L, CHE 312 and CHE 312L are strongly recommended.; Corequisites: BIO 324L
This course is an in-depth study of the metabolic pathways found in both eukaryotic and prokaryotic cells. There is particular emphasis on those pathways that involve carbohydrate, lipid, and protein metabolism, although nucleic acid metabolism is addressed. There are three hours of lectures per week. This course is offered in spring semesters. All students registered for this course must also register for BIO 324L.
BIO 324LBiochemistry Laboratory(1)
Prerequisites: BIO 125, BIO 125L, CHE 124, CHE 124L, CHE 312 and CHE 312L are strongly recommended; Corequisites: BIO 324
This is a laboratory course that will provide students with experience in techniques such as chromatography, cell fractionation, electrophoresis, protein purification, spectrophotometry, and Western blot analysis. One three-hour laboratory period is scheduled each week. This course is offered in spring semesters. A course fee may apply. All students registered for this course must also be registered for BIO 324.
BIO 325Ecology(3)
Prerequisites: BIO 130, BIO 130L, BIO 223, BIO 223L; Corequisites: BIO 325L
This course discusses the principles of ecology and heavily emphasizes community relationships. The major portion of the course will cover the interactions of plants within communities, the interactions of animals within communities, and the interactions of plants and animals within communities. There are three hours of lectures per week. This course is offered in fall semesters. All students registered for this course must also be registered for BIO 325L.
BIO 325LEcology Laboratory(1)
Prerequisites: BIO 130, BIO 130L, BIO 223, BIO 223L; Corequisites: BIO 325
A laboratory course that is based on field and laboratory studies of local plant and animal communities. One three-hour laboratory period is scheduled each week. Offered in fall semesters. Course fee may apply. All students registered for this course must also be registered for BIO 325.
BIO 421Genetics(3)
Prerequisites: BIO 125, BIO 125L, CHE 312, CHE 312L; Corequisites: BIO 421L
This course explores the evolutionary and biochemical principles of genetics. In particular, the molecular nature of heredity is emphasized. There are three hours of lectures per week. This course is offered in fall and or spring semesters. All students registered for this course must also be registered for BIO 421L.
BIO 421LGenetics Laboratory(1)
Prerequisites: BIO 125, BIO 125L, CHE 312, CHE 312L; Corequisites: BIO 421
This laboratory portion of the genetics courses will provide students with hands-on experience with techniques used to explore the molecular nature of heredity. There is one three-hour lecture scheduled per week. This course is offered in fall and or spring semesters. A course fee may apply. All students who are registered for this course must also be registered for BIO 421.
BIO 497Senior Seminar in Biology: Research Proposal Writing(1)
Prerequisites: Prerequisite: Senior standing as a biology major;
This course is designed for senior biology majors to have the opportunity to write and orally present a research proposal. This will include conducting a literature review and designing an original research project. The student will be working under the supervision of a department biologist who will act as a mentor to the student. This class is a prerequisite for BIO 498, the capstone course in biology. This course is offered only in fall semesters.
BIO 498Senior Seminar in Biology: Conducting Research(2)
Prerequisites: BIO 497, and Senior standing as a biology major and;
This course is designed for senior biology majors to conduct research. Students will carry out a research project of their own design. Specifically, students will conduct experiments, write up the results of those experiments, write up the conclusions based on those results, and present the results and conclusions of the project in both written and oral formats. Students will work under the supervision of a department biologist who will act as a mentor and a guide. This is the capstone course in biology. This course is offered only in spring semesters.
 Two other upper-division (300-400-level) courses in biology. Only one of these courses may be taken without a laboratory.(7-8)
Electives14-18
Total Credits122