1. harmful gases such as sulfur oxides, CO2, and nitrogen are released when fossil fuels are burned.
2. it can cause air pollution and "smog"
3. Acid rain is caused by the burning of fossil fuels
Control Group: Group that is being controlled .This group doesn´t receive the treatment from the researchers
Experimental Group:Group that is being Experimented and that receives the testing
The answer to your Q it is doubled rods of condensed chromatin
...respiration!
Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells). Source: https://study.com/academy/lesson/what-is-respiration-definition-process-equation.html
I hope that helps! :)
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