Which protein source is complete?
a. milk or meat
b. soy beans
c. peanut butter
d. red beans and rice

individual oxygen atoms are formed during photosynthesis.-c.

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.