The Mongols only built up Russian cities that were deemed vitally important. <span>was the pattern of Mongol settlement in Russia and that is the correct statement,</span>
The columbian exchange was the exchange of wealth, crops, livestock, and most importantly disease between the new and old world. foreign people came into contact with each other and lacked the needed immunity to prevent illness. some crops exchanged were squash, corn, beans, and potatoes.
