Unit 9 was my favorite unit so far. Evolutionary science really interests me, and I've learned more about it in the past couple weeks than I ever knew before. To know that us humans evolved from fish to reptiles to mammals is quite very interesting. For example, we have learned that our fingers, which we use in everyday life, evolved from the fins of fish. A certain gene called the "Sonic Hedgehog" gene is responsible for the digits, or fingers, we have. Too much of this gene can cause one to develop six fingers in the early stages of life, whereas too little of this gene can cause a baby to be born with only four fingers. The "Sonic Hedgehog" gene also produces patterning of the central nervous system and tooth development.
In Unit 9, all the students had to make a 4-8 minute presentation on a certain genus, family, or species. My presentation was on the topic of sharks. Since sharks have survived all five mass extinctions, learning about them gave me a lot of insight on ancient times. You can view my presentation here.
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