Answer: i believe it is mutation
Explanation: An insertion mutation occurs when an extra nucleotide is added to the DNA strand during replication. This can happen when the replicating strand "slips," or wrinkles, which allows the extra nucleotide to be incorporated (Figure 2). Strand slippage can also lead to deletion mutations.
Answer it’s the left ventricle
The papillary muscle is in the left ventricle if the arrow is looking for more specific
Reason
See attached picture