Question

how did the introduction of animals in the columbian exchange affect many native American cultures

Answer 1

Native Americans were introduced to animals that would be of use later on. 
example: Horses. Riding on horses in battle or just finding a place to settle would have been much easier than walking. So, the were helpful in battle and they were helpful to nomads.

Answer 2

natives were able to use the animals from the columbian exchange to help them in many ways. 
Some examples of these were: horses, cattle, sheep, goats, and pigs.

horses: helped Indians move from place to place faster
cattle: helped Indians in farming, gave them beef (meat) 
sheep: gave Indians wool, gave them lamb (meat)
Goats: Milk, meat,
Pigs:  Pork


hope this helps