Lias conducted an experiment about the effects of exercise on the heart rate of teenagers. before morning basketball practice, he asked the members of his high school team to be his subjects. he measured each of their heart rates before and after a set of exercises. which change would most reduce the bias of his experimental design? test the team members on the same exercises after practice too. test additional boys as well as several girls from different classes. test girls from his school, as well as teachers, siblings, and family friends. test the team members every day for a week to increase data.

Test additional boys as well as several girls from different classes.

Explanation:

Tests the members of the same class will not represent different data and that makes it possible to compare the results to form a correct and efficient conclusion. In this case, the conclusion of the experiment may be presented incorrectly, with a strong presence of bias.

For this reason, the idea would be that Lias reduced the possible bias, testing additional boys, as well as several girls from different classes. This way, he would have a variety of data that could be compared and form an efficient conclusion.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

answer; (phospholipid);