Answer:
the deliberate modification of the characteristics of an organism by manipulating its genetic material.
Explanation:
This probably is Yeast cells they can respire both aerobically and anaerobically. they prefer the presence of oxygen as aerobic respiration produces more energy that anaerobically and produces less waste products than anaerobic respiration.
hope that helps
The type of mutation that does this is a point substitution mutation, more specifically A Nonsense mutation. It changes a codon coding for an amino acid to a codon coding for the signal to stop or terminate translation.