Explains the mechanisms and describes the processes that underlie gravitropism in roots. Reviews experimental efforts and investigative results that explored the causes of root behavior. (ML)

Background information is provided on the natural products found in marine organisms in general and the brown algae in particular. Also provided are the procedures needed to isolate D-mannitol (a primary metabolite) and cholesterol from brown algae. (JN)

Discusses how four standard business software packages can be made to work together as a means of storing herbarium specimen label data and printing new labels. The packages include dBASE III, Quickcode, SuperKey, and PC-Write. Reasons for selecting these packages are considered. (JN)

Visits to gardens can contribute not only to children's science learning, but also to meeting other curricular objectives. When school groups visit a garden, they do so with curricular objectives in mind. However, little work has been done on the early experiences of children in gardens. What do children bring to such visits? How do they interpret…

Discusses the importance of the electron microscope, and in particular the scanning electron microscope, in studying the surface topography, sectional substructures, and patterns of development of pollen grains. The production, dispersal methods, and structure of pollen grains are described and illustrated with numerous electron micrographs. (JR)

Describes techniques for studying historic changes in climate by analysis of pollen preserved in peat bogs. Illustrates the methodology and data analysis techniques by reference to results from English research. (AL)

Article describes outdoor science learning center constructed at minimum cost with help of parents and landscape architect. Five-thousand-square-foot area includes garden, forest, waterfall, hydroelectric plant, mill, weather station, aviary, animal cages, topographical sandpit, teaching station and specimen display cases. (PD)

A popular review of plant physiological research, emphasizing those apsects of plant metabolism where there has been a recent shift in emphasis that is not yet reflected in secondary school advanced texts. (AL)

Suggests science activities using amaryllis plants. Includes information on growing the plant and its annual growth cycle. (SK)

Presented is a discussion of the natural history of the dandelion. Three activities involving study of dandelions are presented. Each activity includes discussion of purpose, skills, and materials needed. (RE)