Hydrogen bonds link nitrogen bases in DNA together.
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Answer:
(in order of appearance in paragraph)
1. Primitive Man
2. Agricultural Man
3. Industrial Man
4. Modern Technological Man
5. Food and Home Uses
6. Agriculture and Commerce
7. Industry and Transportation
8. Coal
9. Gas
10. Solar
11. Wind
12. Nuclear
One of the best ways to use rocks to determine past geography is to look at water lines. Many cliffs contain "stained" waterlines on the surface of the rocks, which shows that water at a certain level used to occupy that area.
Explanation:
washeing by water and colegat
