Biology Laboratories

Welcome to our archive of 185+ digitized images. Note: Any image may be freely used for educational and noncommercial purposes, however, we do reserve all commercial rights.


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Freshwater Algae Links

Marine Algae Links

Microscopes and Microscopy Links

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Counting Program


Last year over 1,400 people visited the marine laboratory at Bowling Green State University and over 100 students were enrolled in marine and freshwater biology courses. The lab, which contains over 3,000 gallons of seawater in over 40 aquaria, is unmatched at Ohio universities. Bowling Green offers an extensive program in courses in aquatic and marine science at both the undergraduate and graduate levels. Through the courses offered in aquatic and marine science at Bowling Green State University, students get the opportunity to obtain an undergraduate degree in biology with an emphasis in marine and freshwater science. With a strong graduate program, undergraduates also get exposure to the latest research techniques and research opportunities.

In the marine lab, eight major phyla are represented in over 66 genera of marine life including sea anemones, corals, starfish, sea urchins, snails, crabs, lobsters, and algae as well as a wide variety of marine fish. The animals in the lab are maintained by students mainly for class study and research projects, but are also present for the appreciation of visitors and other students.

Students interested in aquatic or marine biology are encouraged to get involved right away and maintain a tank in the marine laboratory on a volunteer basis. The students are then urged to take the closed systems course (Biology 370) to integrate the theory of animal management with marine research. Once this has been completed, the students are prepared for more aquatic or marine courses that may ultimately lead to summer internships at marine institutions. The most serious students may choose to conduct research with one of BGSU's researching faculty.

Additional experience can be gained with field study during the summer at the Gulf Coast Research Laboratory in Mississippi or Stone Lab in Lake Erie. Both are affiliated with B.G.S.U. Additional field experience is available at other coastal labs and possibly on research cruises.

The B.G.S.U. Marine Laboratory is located on the second floor of the Life Science building and is open to anyone wishing to view the animals or talk with the students. It is open during normal working hours and on weekends when arranged in advance. Large groups are welcome but are requested to call in advance so arrangements can be made for a tour.

The Microbiology Prep Room is located in room 531A Life Science Building at Bowling Green State University. The facility supports both undergraduate classes and research laboratories in the Biological Sciences Department.

The Prep Room maintains records as required by the Ohio EPA for the storage, treatment, and disposal of Infectious waste. All infectious waste produced by the biology, chemistry and other departments on campus are treated here.

Link to infectious waste disposal procedures.

For more information, contact Sheila Kratzer, Microbiology Technician, at

Sherria-at-SEMIn the SEM, the most common images are made by bombarding a specimen with a narrow beam of electrons and scanning that beam back and forth across the surface of the specimen.

The Scanning Electron Microscope (SEM) is used in many fields of science.  A biologist might use it to study the tiniest structures of an insect, the geologist might use it to learn what chemicals are present in a rock, and the automobile engineer might use it to find tiny defects in a car part. SEM images are created using electrons instead of the photons of light we use to see the world around us.  Electrons have a shorter wavelength than photons allowing much greater magnifications and resolution than with conventional light microscopy.

The most common imaging process begins by passing a beam of electrons through the ultra-thin section to a detector below the specimen. A TEM image of a purified viral DNA is shown here. The theoretical limit of magnification with the TEM is greater than 1,500,000X!

A Transmission Electron Microscope (TEM) is used if even higher magnifications are needed.  A biologist might use it to study the membrane of an organelle.  The chemist might use it to identify a crystalline substance.  A crystalline structure can be determined by studying the patterns of electron diffraction made when the electron beam goes through an ultra-thin crystal.  

try-one-Pax12-junkThis allows us to trace fluorescent labeled compounds in an organism over time or locate labeled structures in the material and generate three dimensional images.

Photons help us view the microscopic world, as for example, in the familiar light microscope and the Confocal Scanning Light Microscope.  The confocal microscope captures images at different depths in a thick material, prepared as living or non-living (fixed) tissue.

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