Final answer:
The statement is false; bilaterally symmetric organisms have two halves that are mirror images of each other. Surgical markers are used on the planned side, and surgery protocols are strictly followed to prevent errors.
Step-by-step explanation:
Bilaterally symmetric refers to a condition wherein a plane cut from the front to back of an organism produces two halves that are mirror images of each other, as per option 'a'. In the context of the question, surgical marking for a procedure like an ovarian cystectomy should be done on the side planned for the operation. If the procedure may involve the other side, after the initial incision, the need to re-determine sidedness does not negate the requirement for correct initial surgical marking.
Moreover, it's important in medical procedures to follow protocols strictly to prevent wrong-site surgeries. Thus, even if there is a possibility of operating on the other side, the planned side must be marked. This ensures clarity and reduces the risk of medical errors during the process.By marking only the planned side, it helps in maintaining the necessary precision and avoids potential errors caused by marking both sides. The surgical team will have a clear understanding of which side is to be operated on, and the surgeon can make the decision to address the right side if needed once the procedure has started.