Answer: Earth is rotating while the moon spinning around it. It takes 24hrs to make a full rotation or a full day.
Answer: The first question answer is 2 and so is the second one.
B and C
Explanation:
3.) Testing multiple variables.
The correct answer is the cluster sample is obtained by selecting individuals who are easily contracted rather than who voluntarily respond because cluster sampling is a way of dividing a group then the individual responsible for picking from the selected population will select people from the cluster in which is easily contacted.
Only RNA uses the base uracil while only DNA contains thymine