The development that belongs at the end of Cherie's timeline is <span> genetic engineering. This is because all the topics in her timeline involve the study, discovery, and development of the human DNA. The last part should include the scientific breakthrough called genetic engineering which allows us today to modify the genetic makeup of organisms to produce desired results.</span>
Sensory neurons receive impulses and carry them from the sense organs to the spinal cord or brain. Interneurons connect sensory and motor neurons and interpret the impulse. Motor neurons carry impulses from the brain and spinal cord to muscles or glands.
Answer:
Answer B
Explanation:
The skull forms to become immovable in order to protect the brain.