Describes a laboratory experiment which focuses on the importance of water in germination and seedling emergence. Discusses the activity's design, expected results, and possible application. Offers suggestions for extending the experiment. (ML)

A three-point linkage system in tomatoes is used to explain concepts of gene mapping, linking and statistical analysis. The system is designed for teaching the effective use of statistics, and the power of genetic analysis from statistical analysis of phenotypic ratios. (Author/SA)

Explains the allium test in which roots are excised from onion bulblets grown in aqueous solutions of a test agent. Root tips are then isolated and stained with aceto-orcein, and chromosomal aberrations are microscopically observed. (Author/AIM)

Describes an exercise used as a follow-up activity to a lecture presentation exploring the basic methodology and theory of shoot tip cultures. Utilizes a factorial experimental design which allows for the determination of the effects of each factor alone and in combination with each other. Other concepts emphasized include dependent and…

Presents a science activity focusing on student ideas about plants and builds a terrarium based on students' ideas about the conditions of plant growth and cycling. (YDS)

Students conducted an experiment to study the plant growth of three Amaryllis plants. Students examined the speed and amount of growth, cross-pollinated the plants to produce seeds, and compared the growth of amaryllis seeds to the growth of onion seeds, a plant in the same family, Amaryllidaceae. (MDH)

Methods of investigating plant root growth developed for research purposes can be adopted for student use. Investigations of the effect of water table level and of ethylene concentration are described, and techniques of measuring root growth are explained. (Author/ML)

Discusses Knob's solution, which was considered the ideal plant growth solution in 1865, and recommends eliminating Knob's solution from active teaching. Describes solution culture basics including nutrient solutions, containers and aeration, and plants and light. (Contains 12 references.) (YDS)

Introduces the plant Amaryllis, which is the common name for the Hippeastrum species. Describes how to grow and bloom Amaryllis in soil using hydroponics. Introduces experiments investigating the anatomy of the bulb, growing and elongation rates, the flower, and foliage. (Contains 21 references.) (YDS)

Describes the life cycle of the Amaryllis plant from bulb to blossom. Suggests 12 activities in which students monitor plant growth, examine plant parts, make drawings of the plant, and eat flowers of other plants. (MDH)

Describes the use of an oven bag as a sterile chamber for culture initiation and tissue transfer. Plant tissue culture is an ideal tool for introducing students to plants, cloning, and experimental design. Includes materials, methods, discussion, and conclusion sections. (SAH)

Activities and experiments with leaves are given for use with elementary students. Classifying and measuring are ideas which are suggested for involving children in some in-depth projects with leaves. (SA)

Recounts an anecdote about a teacher's science anxiety resulting from the mysterious results of a plant growth experiment. Students found that bean plants grew taller in a dark closet because of etiolation. Points out that teachers need to deal with experimental results objectively and resist looking for "right" answers. (MDH)

Provides procedures for growing from spores to demonstrate alternation of generations, life history, and morphology of pteridophytes. (CS)

Presents classroom inquiry-based investigations to investigate wound healing in plant tissues and cells. Students create their own research problems and the investigations can be related to the National Science Standards. (SAH)