What was a negative effect of the columbian exchange on europe?

A negative effect of the Columbian exchange on Europe was the sand fleas arrival to the old world.

Explanation:

The majority of the negative effects were caused to the Americas, nevertheless, the Europeans also had their portion of negative effects. One of them was the sand fleas that inserted their eggs under the skin of the carrier and propitiated unknown infections as well as breakouts in different species. The Europeans carried them in themselves, in animals and even in the inventories of crops and organic tissue they transported to Europe. They also faced rural changes due to the introduction of new world plants to the old world and the modification of the fields lead them to ruin it for profit.

legislative branch:

one of the three branches of government divided between the senate and the house of representatives.

- creates or makes laws

- power to override a veto

executive branch:

one of the three branches of government, headed by the president.

- enforces or carries out laws

- power to veto a bill sent to it by congress

judicial branch:

one of the three branches of government, headed by the chief justice of the supreme court.

- interprets laws

- power to declare laws or actions by the government unconstitutional