Natural Selection: Salt Concentration on Brine Shrimp

  • Describe the mechanisms of genetic variation and the three modes of natural selection.
  • Explain and give examples of important biotic and abiotic factors that influence evolution by natural selection.
  • Conduct counts of hatched brine shrimp.
  • Quantify the effects of salinity on hatching viability of brine shrimp.
  • Relate salinity tolerance of brine shrimp to natural selection.

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Materials

  • Brine Shrimp Eggs
  • 12 Petri Dishes, 15 mm
  • 4 Disposable Pipets
  • Paintbrush
  • 4 Plastic Cups
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