Answer:
B
Explanation:
DNA stands for deoxyribonucleic acid and had AGCT bases. RNA stands for ribonucleic acid and has AGCU bases.
Below 0°C (273.15K, 32°F)
Answer:
Oxygen for the first box, and lactic acid for the second
From the given choices above, the portion that is not readily penetrated by the sunlight is the river's or the stream's mouth. The plant life usually are on the surface of the water. The middle portion is occupied by the fish and other aquatic lives.