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2.1: Faculty Resources Overview - Biology

We’ve seen overwhelming demand for high quality, openly-licensed course materials, including supplemental resources to enrich teaching and learning and to make life easier for instructors. To support this need, we’ve developed and curated faculty resources to use with this course.Free and Open Supplemental MaterialsOn the following pages, you will find supplemental resources that are freely available to use with the interactive learning materials for this course.
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3.1: Week 3: Reading - Biology

The Coleoptera are one of the most primitive insects of the Neoptera, and are characterized by the hardened forewings appearing as a hard shell, the elytra, protecting the membranous wings (used for flight) beneath (Coleo = sheath; ptera = wings). A few key characteristics separate the initial appearance of these two orders: 1) the Hemiptera have only piercing/sucking mouthparts and Coleoptera have only chewing mouthparts (in all stages); 2) the wings of the Heteroptera cross over each other on the dorsum of the insect, and the elytra of the Coleoptera met medially on the dorsum creating a visible suture down the dorsal medial line of the abdomen.
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Mixture Separation (continued)

Filtration: is used for the separation of heterogeneous mixtures consisting of a solid and a liquid component or a solid and a gaseous component. The mixture must pass through a filter, which is made of porous material, and larger diameter particles are trapped in the filter. For a material to be used as a filter its pores must have a very small diameter.
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