Question:
Choose your answer: Is "Biological magnification is the process whereby these chlorinated hydrocarbons (pesticides) are more concentrated at each level of the food chain." a good answer to the question "Why are hydrocarbon pesticides not excreted?"
Answer:
no

Question:
Choose your answer: Is "The PermianTriassic extinction event, 251 million years ago, was the worst; vertebrate recovery took 30 million years." a good answer to the question "How long did vertebrate recovery take?"
Answer:
yes

Question:
Choose your answer: Is "East of the divide the Missouri River, which is formed by the confluence of the Jefferson, Madison and Gallatin rivers near Three Forks, flows due north through the west-central part of the state to Great Falls." a good answer to the question "Which year was the Fort Peck Reservoir designated a National Scenic River?"
Answer:
no