Ruth has come down with measles. she remains ill for a few days but is unlikely to get measles again. which type of immunity is characterized here?
innate immunity
acquired immunity
internal immunity
nextreset

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.

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.