Final answer:
The correct option is D. A somatic mutation is a mutation that occurs in the body's non-reproductive cells and does not affect future generations. Examples of somatic mutations include mutations in embryonic muscle cells and adult nerve cells.
Step-by-step explanation:
A somatic mutation is a mutation that occurs in the body's non-reproductive cells. It is not passed on to offspring. An example of a somatic mutation is a mutation in an embryonic muscle cell (option A) or a mutation in an adult nerve cell (option C).
These mutations only affect the specific cell and its daughter cells and do not impact the genetic makeup of future generations. A somatic mutation is a mutation that occurs in the body's non-reproductive cells and does not affect future generations. Examples of somatic mutations include mutations in embryonic muscle cells and adult nerve cells.