What properties are shared by all modern cells?

Select all the true statements about the cosmic microwave background radiation

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.

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