Question

1. in the carbon cycle, what role do phytoplankton play? a) they consume carbon during photosynthesis b) they release carbon into the atmosphere c) they store carbon in sediments d) they produce nitrogen 7. what can excessive nutrient pollution in the ocean lead to? a) increased biodiversity b) improved water quality c) enhanced oxygen levels d) eutrophication 8. what is a major consequence of oil spills on marine ecosystems? a) enhanced photosynthesis b) increased fish populations c) smothering of marine organisms d) reduced acidity levels 9. what region has been significantly impacted by ocean acidification, particularly affecting oyster populations? a) the pacific northwest b) the gulf of mexico c) the caribbean d) the mediterranean sea 10. what strategies are being implemented to mitigate the effects of ocean acidification on shellfish? a) reducing shipping traffic b) monitoring water chemistry and buffering hatchery waters c) banning all fishing activities d) introducing new species to the ecosystem

Explanation:

1. Phytoplankton consume carbon during photosynthesis. This helps in reducing the amount of carbon - dioxide in the atmosphere.
2. Excessive nutrient pollution in the ocean leads to eutrophication, which causes over - growth of algae and depletion of oxygen in water.
3. Oil spills smother marine organisms by coating them with oil, disrupting their normal functions.
4. The Pacific Northwest has been significantly impacted by ocean acidification, especially oyster populations.
5. Monitoring water chemistry to track changes and buffering hatchery waters to maintain suitable conditions are strategies to mitigate the effects of ocean acidification on shellfish.

Answer:

1. a) They consume carbon during photosynthesis
2. d) Eutrophication
3. c) Smothering of marine organisms
4. a) The Pacific Northwest
5. b) Monitoring water chemistry and buffering hatchery waters