How long the fossil has been there for and what type or creature it is
Answer:
21
Explanation:
Amino acids are the basic structural units of proteins. Our bodies contain 21 amino acids it uses to make all proteins, although books recognize only 20 amino acids. The 20 amino acids are the alphabet of proteins.
Cancer cells do not respond to signals that regulate the cell cycle , I believe it’s b
Answer: absolute certainty is often difficult to achieve. Scientific uncertainty generally means that there is a range of possible values within which the true value of the measurement lies.
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