Living plants and animals serve as valuable aids in stimulating interest in the biology course and, during that part of the year when field trips are impossible, provide material for the study of habits and the relation of organisms to their environment. Laboratory conditions are of course artificial but they should be made as nearly natural as it is possible to make them.
©1929 by Iowa State Teachers College
Clark, O. R.
"Living Material in the Laboratory,"
Science Bulletin: Vol. 2:
4, Article 3.
Available at: https://scholarworks.uni.edu/science_bulletin/vol2/iss4/3