Answer:
The act of observing or making an observation.
Explanation:
Scientists worked backwards by looking into the amino acid sequence to determine the DNA base. They started with the mRNA which transcribes the codon into respective amino acids. This human gene is found on top of chromosome 11 in human DNA.
The answer to the question is D. Infiltration.
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I think it is C as plants take in Co2 and release oxygen which humans use to breathe.
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