The Middle Ages is a period of European history that lasted from about the 5th century to the 15th century, C. E. The Middle Ages are also known as the

The Middle Ages is a period of European history that lasted from about the 5th century to the 15th century, C.E. The Middle Ages are also known as the Medieval Period or the Dark Ages.

Explanation:

Middle Ages started in 476 when the Germanic tribes destroyed Western Roman Empire.

They built many new countries on its soil, based on a feudal system.

Middle Ages lasted until 15th Century, until the fall of Constantinople in 1453, or more commonly to the discovery of America by Christopher Columbus in 1492.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

what words? are you talking about to complet what sentence