The concentration of carbon dioxide in the atmosphere in 1958 was 310 ppm and rose to 390 ppm in 2009. the percent increase in carbon dioxide over this period of time is closest to:

Nucleic acid certain protein cell membranes certain carbohydrates

Individuals do not compete directly for resources, but are prey for the same predator

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called