What is the main function of the Krebs cycle?
A. Breaking down energy carriers
B. Using pyruvate to make energy carriers
C. Producing oxygen for use in photosynthesis
D. Producing large numbers of ATP molecules

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.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

amber has allowed scientists to study dna that has been preserved over millions of years.

not too sure but maybe in the hot springs.