Failure of hunter-gatherers to adopt agricultural was seen to be a product of their backwardness. Describe 3 different uses of tree bark. List and briefly describe the plant source and uses of a hard fiber, a bast fiber and a seed fiber. Name one psychoactive drug which is structurally similar to the neurotransmitter serotonin. Religion is the opiate of the people.
Opiates are the religion of the people.
Describe the use of at least two different drugs, other than peyote, in your answer. Briefly describe the modern peyote ritual. List 3 different characteristics of wood which may affect the suitability of the wood for a particular use, and explain the structural or chemical basis of each feature.