Some say the precautionary principle is analogous to the judicial concept "guilty until proven innocent ." In the United States , one is " innocent until proven guilty " in the court system . Do you think regulators in the United States should apply the precautionary principle to chemicals for which toxicity levels have not been determined ? Explain your reasoning.

Fill in the blank with the best word to complete the sentence. white blood cells protect against and aid in blood clotting when injuries are sustained.

Agroup of organisms that changes over time is said to

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.