He inferred that similar changes had happened in the past. Uniformitarianism combines the idea of gradual change over time with Lyell's observations that such changes have occurred at a constant rate and are ongoing.
Through Polymerization larger molecules are formed.
If i remember correctly they should be adenine (A), thymine (T), guanine (G) and cytosine (C). i hope this helps. sorry if they arent all correct.
new inventions such as machines
C.) 45 AND 75............