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

b

is correct hope this   also i learnd this in middle school

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

what in the weirdo : o