It can change but inter fearing with each other
Answer:
Control group
Explanation:
A control group is<em> a group of individuals in an experiment where the independent variable being tested (the exposition to cigarette smoke in this case) can't influence the results.</em> This control group will be then compared to the experimental group (exposed to the smoke) to see the effect of the variable evaluated.
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Grasslands are describe as lands by grasses rather than extensive shrubs or trees and include the savanna and temperate grasslands.
<h3>How savannas different from grasslands?</h3>
The grass in the savanna is yellow and dried for the biggest part of the year, there's also lots of shrubs, and also small communities of trees that are on certain distance from one another.
The grass in the grasslands is green for the biggest part of the year because there's much more rain which is also better distributed throughout the year. This also allows lots of flowers and herbs to grow in the grasslands, thus making it have a nice spectrum of colors in between the greenness.
Thus,Grasslands are descibed as lands conqured by grasses rather than big shrubs .
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Blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs.
The only job of the pulmonary artery is to carry deoxygenated blood from the heart to the lungs.
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