Explain how it is possible to have thousands of different proteins when there are only 20 different amino acids

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

What makes a dominant allele different from a recessive allele

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?