When the upper water layers warm in the summer months, they become separated from deep water by a transition zone known as a thermocline. In a thermocline, the temperature decreases rapidly with small increases in depth. This phenomenon linking temperature change with depth is called temperature stratification.
The cell membrane's selectively permeable surface
Answer: d.
a nucleic acid
DNA (deoxyribonucleic acids)
Is a type of nucleic acids.
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