The strand of dna for a particular gene that is copied by the rna polymerase to form mrna is called the strand.

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.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface