Select all the correct answers. Which two statements are true of the Caddoan Mound Builders?
They were likely a part of the Mississippian culture.
They were the first modern Native Americans in Oklahoma.
They built earthen mounds to use exclusively as burial sites.
They had little contact with other societies in North America.
The built 11 mounds at Spiro near the Arkansas River.
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sorry i do not know this

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse

the answer to your question is c

southern north america: yucatán peninsula in southern mexico extending into northern guatemala, and northern belize. these moist forests on the yucatán peninsula of south-eastern mexico are characterized by a tropical humid climate with little topographic relief.

explanation: