What allowed the earth’s atmosphere to increase in oxygen concentration?

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

Abacteriophage typically attaches to the bacterium and then

The actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?