Can someone me with these : : 1: what two processes give off co2 , in the environment? 2: what process gives off o2 in the environment? 3: what process makes the water vapor in the atmosphere available to the organisms on land? 4: how does water vapor return to the atmosphere? (2 ways)

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation: