X-rays are the radiation that allows us to see through the skin to visualize bones
The structure that temporarily stores food in an amoeba is called the Vacuole
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:
D
Explanation:
Fire is man made because for there to be fire you have to strike a match or use other man made sources
