Answer:
Some amino acids are encoded by more than one codon, inasmuch as there are 64 possible base triplets and only 20 amino acids. In fact, 61 of the 64 possible triplets specify particular amino acids and 3 triplets (called stop codons) designate the termination of translation.
The answer to this question is:
Light (sunlight), water, and carbon dioxide! Oh, and chloroplasts.
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Hope this helps <3
Climate changes thats what im guessing .. not too sure though ... sorry