Answer:
concentrating and clarifying stock.
Explanation:
just got it right on the mastery
Answer:
Explanation:
he region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
bassically one layer of the atmospere
Circulatory and respiratory systems.
Phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine.