What are four positive and 4 negative impacts of the columbian exchange? And also, please explain each; *please*

Explanation:

Positives:

1. From the old world to the new world: sugar cane

The Spanish brought sugar to Mexico and Peru in the 16th century.

2. From old World to new world: cows, oxen, horses, donkeys, pigs, sheep

Cattle were brought to Mexico in 1521. they became an important source of food and pulling and lifting heavy loads. the horses allowed hunters to travel great distances and increased the area over which natives searched for food. donkeys were important pack animals. pigs and sheep were used for food and clothing.

3. From the new world to old-world: potatoes

The climate and soil if northern Europe were well suited to grow potatoes.

4. From the old world to the new world: bananas

First grown in southeast Asia and brought to Caribbean islands in 1516.

Negative:

1.From the old world to the new world: rat infestation

Rats hitched rides on ships carrying English settlers.

2. From the new world to old-world: sand fleas

They penetrate human skin. they deposit eggs under the skin and can cause dangerous infections.

3.From the old world to the new world: diseases that devastate animals

European animals brought diseases with them that attacked llamas and alpacas.

4.Old world to new world: exploitation of workers and slavery

loss of life from war and disease created a shortage of labour. Europeans turned to Africa to fill their needs for workers.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

those who allied with france gained land and power.