All DNA is remarkably similar, but some more than others. Humans' DNA would be closer to other mammals' than it is to, say, a bird. Using DNA shows how varied an animal really is from another. Specific parts of the DNA code for different things, so you might see a similar structure for wings and flippers.
The Catskills are considered a dissected plateau as at one point it was a complete plain level land that due to seismic activity got uplifted and then eroded over time, otherwise the entire land piece is part of a much larger plateau.
The amount of hydrogen will decrease.
It's called that because it employs visible light to detect small objects.
