The <u><em>correct answer</em></u> is:
He needs to select a more representative sample.
Explanation:
Choosing students from the basketball team for the sample he uses on a study of heart rates and exercise will be a biased sample. This is because students on the basketball team are potentially healthier than other students, which means that exercise will not have a large an effect on their heart rate as it would if they were not as healthy and not as physically fit.
In order to reduce the amount of bias, he should choose students from different groups throughout the school.
Answer:
The correct answer is - acidic and basic
Explanation:
Birds and reptiles lay amniotic eggs. They consist of a shell, embryonic membranes, and the embryo.
The answer is A. C and G go together and A and T go together.
