Maturation is a threat to internal validity stemming from either long-term or short-term physiological changes occurring within the participants that may influence the dependent variable.
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What are physiological changes?</h3>
Ageing causes physiological changes in all organ systems. Arteriosclerosis develops, blood pressure rises, and cardiac output declines. Lung function is compromised, vital capacity is reduced, and expiratory flow rates are slowed.
Pregnancy causes a number of physiological changes in the mother, such as an increase in fat and total body water, a drop in plasma protein concentrations, particularly albumin, an increase in blood volume, cardiac output, and blood flow to the kidneys, and a decrease in blood pressure.
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Many of Egyptian innovations are still in use today like calender's forms of Geometric principles.
Explanation:
Egyptians were one of the oldest and one of the most advanced civilizations of its time.
It had been able to make advances in calendar and geometry as well as astronomy.
Its greatest asset and one that led the country in to a good civilizing process was their insistence on a system of irrigation.
Their irrigation techniques produced surplus food that was able to become the controlling power for a lot of people in the civilization and it was one of the defining features of their rule.
Answer:
In early America, democracy was limited to a small social group within the nation's population: only white men with a certain economic status could make their voices heard at the dawn of the United States as an independent nation. On the contrary, the poor, blacks and women did not have the right to vote, and their opinions were therefore not admitted when forming the popular will through elections.
Answer:
C. Challenge any laws that individuals claim unconstitutional.
Explanation:
The answer is 3) From calls made to one hundred randomly generated telephone numbers, people replied to a question about television shows they watch
This is because the people questioned were completely chosen at random and were asked about something they might or might know much about. This is easily the least biased option.
However, other surveys were not biased, e.g. asking heart surgeons about children's diet or asking ex-employees of The World of Baseball Bookstore about the importance of baseball.
These are not a random selection and might not actually provide accurate results.
