Although It Has Been Smoked and Chewed for Hundreds of Years

question 37

True/False

Although it has been smoked and chewed for hundreds of years, tobacco was not used intensively enough to cause widespread illness until the 20^th century.

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Definitions:

Pupil

The opening in the center of the iris of the eye that allows light to enter the retina.

Iris

The colored part of the eye that controls the size of the pupil and the amount of light that enters the eye.

Muscles

Tissues in the body that have the ability to contract, enabling movement of the body and maintenance of posture.

Complexity

A characteristic of systems, models, or problems that have multiple interconnected parts and variables, which make understanding or solving them challenging.