A rare toxic chemical polluted a lake in Wyoming. Many years later scientists discovered that a city in Kansas, 1000 miles away from the toxic spill, was polluted with the same rare toxic chemical. Scientists believe that the toxic chemical found in the Kansas well was the result of the toxic spill that occurred 1000 miles away. The people in Kansas were very confused about the scientist's discovery. How could this be possible since the well was so far away from the lake or any river?

this is a good question! i'll do some research and come back when i have the answer!

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products