A demonstration that can be used to illustrate diffusion and osmosis is presented. Discussed are materials, procedures, and an explanation for the effect. (CW)

Provides an activity that focuses on the color changes of leaves and reinforces lectures in ecology, plant physiology, and the scientific method. (ASK)

Stereology is the study of three-dimensional objects through the interpretation of two-dimensional images. Stereological techniques used in introductory botany to quantitatively examine changes in leaf anatomy in response to different environments are discussed. (JN)

Presented is an activity that illustrates the relationship between the soil found in containers and soil in the ground including the amount of air and water found in each. Sponges are used to represent soil. Materials, procedures, and probable results are described. (KR)

Presents an identification method which uses the process of elimination to identify pollination systems. Provides the polyclave key, methodology for using the key, a sample worksheet, and abbreviation codes for pollination systems. (MVL)