The answer is b, chloroplast.
Answer:
B
Explanation:
since the impulse is moving form Q to P ...Q will be the receptor and P is the relay neuron which will transfer the impulse to the next neuron
"D: A new gene, which codes for the protein that can repair defective genes, is introduced."
Explanation: <span>Gene therapy is an experimental technique that uses genes to treat or prevent disease. In the future, this technique may allow doctors to treat a disorder by inserting a gene into a patient’s cells instead of using drugs or surgery.</span>
