The Chemistry students reviewed molarity calculations and the titration calculations. There will be a quiz tomorrow on this material. This will represent the first points for Learning Objectives for the second semester. The prize winners got a DrumStick, that creamy ice cream surprise that is pretty much a perfect food.
The AP Biology students discussed the biological species concept and why a liger is a really bad idea. It is, of course, a genetic dead end and a waste of good gametes. We also learned about the barriers between species and why it's impossible for a dog to mate with, oh I don't know, a salamander. That would probably be a prezygotic mechanical barrier. It had better be.