Electric current, which is the flow of electrons through a material.
Answer:
The concentration effect occurs because DDT is metabolized and excreted much more slowly than the nutrients that are passed from one trophic level to the next. ... spraying a marsh to control mosquitoes will cause trace amounts of DDT to accumulate in the cells of microscopic aquatic organisms, the plankton, in the marsh.
Explanation:
There would be more prey than predators, as for a predator to have a balanced diet it should have a plentiful supply of food, meaning it needs more prey. there would be less predators because there shouldn't be so many they would outnumber the prey or so little they can't repopulate and die out.
Answer: 500 feet
You must yield the right-of-way to any fire engine, ambulance, or other emergency vehicle flashing red lights. Drive to the right edge of the road and stay at least 500 feet behind any moving fire truck or ambulance. Do not go nearer to them nor stop in the intersection.
