You can't see anything in a cave anyway however the main adaptations needed are touch and smell to stay alive and find food.
Answer:
neurotransmitter serotonin is lower
Explanation: neurotransmitter serotonin is lower in individuals who have depression
Answer:
1)true because they were nomadic and followed animals across the land bridge
2)False because native americans did not always have shortages on food and when they first started growing crops they had a surplus of crops
