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What Measure of Migration Tells Whether More People Are Entering

question 82

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What measure of migration tells whether more people are entering or leaving a country?


Definitions:

Mucous Membrane

Moist tissue layer lining several body cavities and internal organs, including the mouth, nose, and lungs, secreting mucus for protection and lubrication.

Heart

A muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system by rhythmic contraction and dilation.

Arrector Pili

Small muscles connected to hair follicles that, when contracted, cause hair to stand up, producing 'goosebumps'.

Goose Bumps

The raising of small bumps on the skin due to the contraction of miniature muscles at the base of hair follicles, usually in response to cold or fear.

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