(Q).
Answer the following question given this paragraph:   Behind each release of gas is an army of gut bacteria undergoing some crazy biochemistry. These bacteria break down the remains of digested food through fermentation, creating gas in the process. Learn what these bacteria have in common with beer brewing at http://youtu. be/R1kxajH629A?list=PLzMhsCgGKd1hoofiKuifwy6qRXZs7NG6a .   Q: Bacteria break down the remains of digested food through a processed called what?   Choices:  - regulation  - oxidation  - synthesis  - fermentation  A:
(A).
fermentation


(Q).
Answer the following question given this paragraph:   repeating bony units that make up the vertebral column of vertebrates.   Q: What do vertebrates possess that is made up of repeating bony units?   Choices:  - notochord  - skull  - spinal cord  - vertebral column  A:
(A).
vertebral column


(Q).
Answer the following question given this paragraph:   Another major problem caused by air pollution is global climate change. Gases such as carbon dioxide from the burning of fossil fuels increase the natural greenhouse effect. This raises the temperature of Earth’s surface.   Q: What gas is contributing to the greenhouse effect?   Choices:  - nitrogen  - oxygen  - sodium chloride  - carbon dioxide  A:
(A).

carbon dioxide