Describes an ecology exercise suitable for secondary school students in which the school grounds may be used to study communities in association with woody plants. (JR)

Describes the construction and operation of a network of entirely passive electrical components that gives a response to an electrical shock similar to an action potential. The network of resistors, capacitors, and diodes was developed to produce responses that would mimic those observed, for example, when a dark-grown pea epicotyl is shocked…

The file organization for the computerized Flora North America (FNA) data bank is described. A four level character hierarchy allows subdivision of any flora description into as many as four levels in order to specify plant character precisely. Terms at any one level will not necessarily be parallel in status. Both PLANTS and LEAVES serve as…

This bulletin describes 46 of the more common trees found in Minnesota's forests and windbreaks. The bulletin contains two tree keys, a summer key and a winter key, to help the reader identify these trees. Besides the two keys, the bulletin includes an introduction, instructions for key use, illustrations of leaf characteristics and twig…

As a basic teacher's guide to the study of plants in their environment, this document serves primarily as a starting point for outdoor education with an American Indian emphasis in the State of South Dakota. The State is divided into three broad environmental categories or "biotic communities" (Prairie and Plains, Woodlands, and Wet…

This paper describes open-ended experimentation with the fungus Pilobolus for laboratory work by high school students. The fungus structure and reproduction is described and sources of the fungus are suggested. Four areas for investigation are suggested: the effect of a diffuse light source, the effect of a point light source, the effect of light…

Provided is a dichotomous key to the common genera of marine algae and angiosperms which are taken aboard the Orange County Floating Marine Laboratory. It is designed primarily for use by junior and senior high school students. Drawings of representative members of the various genera are included. This work was prepared under an ESEA Title III…

This instructional package contains two plant life units developed for the Dade County Florida Quinmester Program. "Plant Life in the Backyard" introduces the student to the more familiar plants in South Florida. Emphasis is placed on the economic value of local plants, plant propagation, and photosynthesis. "The Green Plant"…

Presents an attempt to explore plant chimeras and to demonstrate the separation of genetically distinct tissue in a chimera using an easily grown scented geranium plant. (HM)

Experiments are described in which inhibitors are used to investigate the timing of transcription and translation of the messenger RNA for the enzyme invertase. It is suggested that plant tissue slices provide adaptable material with which to study enzyme induction, protein synthesis, and cell differentiation at sixth-form level. (Author/MA)

Discusses problems in selecting the correct herbicide for use in controlling aquatic weeds, considering specificity, size of the market, fear of trace contaminants, and herbicide resistance in weeds. Also summarizes some successful herbicides, providing a table listing mode of action of some herbicides used for control of aquatic plants. (JN)

Clearing is a simple and rapid technique in which 75 percent lactic acid is used to remove pigments and cytoplasmic contents of fresh leaves, enabling microscopic view of various internal leaf layers. Procedures for using the technique (which helps students gain a more thorough understanding of plant anatomy) are given. (DH)