I don't get the carbon dioxide cycle

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom