Reflex arcs are considered evolutionarily useful mainly because:
Question
Reflex arcs are considered evolutionarily useful mainly because:
The brain's thinking process is not fast enough for urgent situations
They replace the need for a brain entirely
They only work in plants
They require conscious thought
Answer
The brain's thinking process is not fast enough for urgent situations
Detailed Explanation
Reflex arcs evolved because thinking through the brain would take too long for urgent situations like touching a hot object; the reflex arc allows a much faster response.