American Biology Teacher
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ABOUT OUR COVER
Ed Reschke’s photo of a Roseate Skimmer (Orthemis ferruginea) graces this month’s issue of The American Biology Teacher. The Roseate Skimmer dragonfly is from the Family Libellulidae and the male of the species (pictured on the cover) is very striking.
It wasn’t until 1901 that this species had accumulated more than one specimen on the official record, taken in Key West , Florida , 1864. It has a beautiful dazzling metallic red and blue head with a tangerine colored thorax and abdomen. It is now known to live along the water drainages of southern New Mexico , Pecos, Gila, and Rio Grande , among other regions. It can be seen skimming above small freshwater streams where its nymphs are found in the silty bottoms of shallow streams that feed larger rivers and sinkholes especially in the state parks with lakes. Mating takes place entirely in flight and may occur in about 8-12 seconds. The male guards the female for the one to three minutes in which she lays her eggs.
Reschke took the shot with a Nikon 8008s camera, a 200mm Nikon macro lens, and Fujichrome Vevia film in Everglades National Park .
February 2006 Contents
Human Genealogy: How Wide & Deep Do Our Genetic Connections Go?
J.K. Bhattacharjee G.R. Janssen T.G. Gregg ... 69
Students’ Ideas About Plants & Plant Growth
This national study provides insights into young students’ ideas about plants and plant growth.
Charles R. Barman Natalie S. Barman Mary Stein Shannon McNair ... 73
Exploring Biotechnology Using CASe-Based Multimedia
Software that helps high school and university students solve genetic and infectious disease cases and tackle difficult ethical issues.
Mark Bergland Karen Klyczek Jean Emmons Karen Marsh Michelle Jarvis-Uetz Mary Lundeberg Jennifer Sweet Christine Martin Joy Werner ... 81
INQUIRIES & INVESTIGATIONS
Leaf Stomata as Bioindicators: Stimulating Student Research
A simple laboratory technique allows students to explore leaf stomata as bioindicators for a variety of environmental changes.
Steven B. Case ... 88
Inquiry With Seeds to Meet the Science Education Standards
Combining an inquiry based learning cycle with the lifecycle of a seed.
Patrick D. Krantz Lloyd H. Barrow ... 92
Using Trypsin & Soybean Trypsin Inhibitor To teach Principles of Enzyme Kinetics
Simple, reliable guided-inquiry exercises that demonstrate the meaning of Km & Vmax.
David Howard Julie Herr Rhiannon Hollister ... 99
Using “Chromosomal Socks” to Demonstrate Ploidy in Mitosis & Meiosis
Using pairs of socks to simulate pairs of chromosomes can help students understand ploidy changes during mitosis and meiosis.
Joseph P. Chinnici Somalin Zaroh Neth Leah R. Sherman ... 106
Letters ... 71
Maura C. Flannery, Department Editor ... 113
Classroom Technology Reviews
José Vázquez, Department Editor ... 118
Roxanne Price, Department Editor ... 119