Answer: conservative model
Explanation: DNA isolated after one generation produced a single band which was a higher and intermediate in density between the heavy and light Nitrogen isotopic DNA used, showing that the first generation was a hybrid DNA. This observation fit with the dispersive and semi-conservative models only. And so at this generation, the conservative model was discarded.
Nose : )
Explanation:
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Evolution is the theory of slow change during long time periods.
Iron, oxygen and water react with the iron creating a substance known to us as rust.
Hope this helps.
I believe the answer is true. Humans have a digestive track, which removes unwanted matter from the body.