Because we spin on a side ways axis only showing on side at the time, and the moon also rotates so we don't only see one side of the moon, we only see what our eyes percieve
Answer:
Evolution
Explanation:
Whenever a species changes over a period of time, it's called Evolution, which is (normally) driven by Natural Selection.
D.uracil is the nitrogen base bind with adenine
Digestive System, Stomach, Stomach Lining, Epithelial Stomach Cells.
Pretty sure unless its reverse.
