Worm Watch Lab. Molecular Workbench. Three Views of MW Senior Scientist and Molecular Workbench Developer Charles Xie, Researcher and Manager Amy Pallant, and Technology and Curriculum Developer Dan Damelin describe the history of Molecular Workbench and our vision for the future. Watch the Video undefinedundefinedundefined Selected Curriculum Modules Transistor Semiconductor Plasma Molecular Rover Chemical Bonding Chemical Resp. Diffusion Heat & Temperature Electrostatics Phase Change DNA to Protein Mission: Immunity Lipids & Carbs Tree of Life Proteins & DNA Harvest Light Quantum Mechanics Crystallography More Modules » Launches MW Create Your Own Simulations MW is not just a collection of simulations—do not be deceived by first glance.
Learn More in MW's Online Manual » Launches MW Create Your Own Curriculum Modules A simulation without instructional support is difficult for students to use. Learn More in MW's Online Manual » Launches MW Fun Stuff Electrostatic Maze 3D Maze Roving Nanogear Block Feeder Probability Machine Dainty Walker Water Wheels. EteRNA - Played by Humans. Scored by Nature. Eskeletons. The Madingley Model. Organisms. Coleoptera. David R. Maddison Click on an image to view larger version & data in a new window Tree from Beutel (1997) and Beutel and Haas (2000). Introduction The Coleoptera, or beetles, includes many commonly encountered insects such as ladybird beetles (family Coccinellidae), click beetles (Elateridae), scarabs (Scarabaeidae), and fireflies (Lampyridae). The oldest beetle fossils are from the Lower Permian (about 265 million years old; Ponomarenko, 1995); since then the group has diversified into many different forms.
In one sense the most unusual property of beetles is not some aspect of their structure or natural history, but their sheer number. Characteristics The most distinctive feature of beetles is the hardening of the forewings into elytra; it is from this that they get their formal name (koleos - sheath, pteron - wing). Other derived characteristics of beetles are: Beetles are holometabolous insects, normally with adecticous, exarate pupae. The Suborders of Coleoptera References About This Page. Encyclopedia of Life - Animals - Plants - Pictures & Information. Wikispecies, free species directory. Zooniverse - Real Science Online.