A single insertion or deletion of a nucleotide will basically lead to a frameshift mutation where the “reading frame” is disrupted. Normally, amino acids are encoded by three nucleotides, called a codon.
Small herbivorous fish would occupy the role of a C. primary consumer. Primary consumers consume primary producers, and primary consumers are then consumed by secondary consumers. Once secondary consumers die, they are consumed oftentimes by decomposers.
Hope this helps!
