What does an unconformity in a sequence of rock layers reveal about geologic history? a. a rock layer must have turned upside down. b. a layer of rock might have eroded. c. the layers must cover hundreds of square miles. d. the layers must have been deposited very quickly.

Which of the following statements about pesticides and residue is false? a. most conventionally grown produce has detectable levels of pesticides when purchased from the store.b. the us government has determined that small levels of pesticides in produce is safe for humanconsumption.c. organic produce always will be pesticide-free.d. farm workers, children, and pregnant women are at greatest health risk from pesticides. select the best answer from the choices provided.

Which of the following graphs represents exponential decay

Which arrow is closest to laguna madra bay? a. 1 b. 2 c. 3 d. 4