Answer:
They are 3 in numbers
Explanation:
which are the airway, the lungs, and the muscles of respiration
Adenine and guanine
Thymine and cytosine
Answer: C
Explanation: The Moon has phases because it orbits Earth, which causes the portion we see illuminated to change. The Moon takes 27.3 days to orbit Earth, but the lunar phase cycle (from new Moon to new Moon) is 29.5 days.
