What is a mutation? A. The visual appearance of an organism

B. A damaged protein

C. A permanent change in DNA or RNA

D. A harmful change to an organism's phenotype ​

A permanent change in DNA or RNA

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

answer; hypnagogic sensations)