Answer:
a) the oxidizing agent.
Explanation:
In the citric acid cycle, malate is dehydrogenated into oxaloacetate and the reaction is catalyzed by malate dehydrogenase. The released electrons are accepted by NAD+. So, NAD+ is reduced into NADH. The substances that accept electrons during chemical reactions and are reduced to oxidize the other substances are called oxidizing agents. NAD+ serves as an oxidizing agent as it accepts electrons to oxidize malate into oxaloacetate.
Answer: b. removes nutrients from seawater.
An oil spill is the release of oil which is used to run vehicle in water like boat and ships. The liquid oil like liquid petroleum hydrocarbon are spill over the water. This acts as a chief water pollutant. This oil adds up minerals to the seawater.