Question Detail
Question
The correct sequence of levels in life's hierarchy of man, proceeding downward is: a. nervous cell, nervous tissue, brain, nervous system b. brain, nervous system, nervous tissue, nervous cell c. nervous system, nervous tissue, brain, nervous cell d. nervous system, brain, nervous tissue, nervous cell
Correct Answer
Option D is the correct answer.
Detailed Explanation
Proceeding downward means from largest to smallest. The correct order is: Nervous System (largest) -> Brain (an organ within the system) -> Nervous Tissue (which makes up the brain) -> Nerve Cell (the smallest unit).
Hint
Start with the whole system and break it down into its components.