What is the difference between a species in a population

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Suppose that b. madurai is commonly collected in freshwater areas near boat harbors and marinas but is haraely found in pristine waters. first, design an experiment that tests an adaptation of b. madurai to some aspect of its environment. in your design, be sure to include a question to test, a hypothesis, and a plan for how you will collect and analyze data.