During the daytime, uneven heating of Earth’s surface causes the beach to heat more than the ocean water. A low-pressure and high-pressure system is created that circulates the air over the ocean and the beach. Choose the correct combination of arrows that represents the movement of air.

2 middle ones, top first then bottom it seems.

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.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products