Biology
Ancient Civilizations
100

Organisms maintain "_______" to stay alive

Homeostasis

100

This is the region where the first civilizations started

Mesopotamia 

200

this is the process cells use to make energy

cellular respiration

200

The period in which the black death occurred in Europe 

Middle Ages
300

this is the place where chromosomes are stored in a cell

Nucleus

300

This empire ranged from 359 B.C. to 323 B.C founded by Alexander the Great .

Macedonian empire

400

this is the organ system that helps organisms breath

respiratory system

400

Other then the Great Pyramids, Egypt was also famous for the Valley of ____

Kings

500

To keep diseases away is the primary function of this cell in the blood

white blood cell

500

From 2500–1700 bce, this civilization in the area of Pakistan and India was really advanced, but disappeared out of nowhere. 

Harappan Civilization

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