9. The African Sahara changes less when a disease hits than when that same disease hits the American Prairies. How can you explain this observation?

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

the answer is c.mitochondria. glad to .

answer increasing the intensity, duration,and frequency of exercise progressively;