IBDP ESS 4.3 SL Quiz

Which organisms form the base of most aquatic food webs?

• Zooplankton

• Phytoplankton

• Small fish

• Aquatic insects

What percentage of global animal protein consumption comes from aquatic food sources?

• Less than 5%

• 10-15%

• 17-20%

• Over 30%

Which of the following is NOT a reason for fishery collapse?

• Overfishing

• Habitat destruction

• Implementation of marine protected areas

• Bycatch of non-target species

What is the term for the theoretical maximum amount of fish that can be harvested without depleting the stock?

• Sustainable catch limit

• Maximum sustainable yield (MSY)

• Biological carrying capacity

• Total allowable catch (TAC)

Which fishing practice has the highest level of bycatch?

• Pole and line fishing

• Trap fishing

• Bottom trawling

• Spearfishing

What is the primary purpose of a marine protected area (MPA)?

• To increase tourism revenue

• To conserve biodiversity and protect habitats

• To provide exclusive fishing rights to local communities

• To block shipping lanes in sensitive areas

How does ocean acidification affect marine organisms with calcium carbonate shells?

• It causes their shells to dissolve

• It makes their shells thicker and stronger

• It has no effect on shell formation

• It changes shell color but not structure

Which of the following is NOT typically considered a sustainable aquaculture practice?

• Recirculating aquaculture systems

• Antibiotic use in high-density farms

• Integrated multi-trophic aquaculture

• Shellfish farming

What led to the collapse of the Atlantic cod fishery in the 1990s?

• Ocean acidification

• Overfishing and poor management

• Disease outbreak

• Invasion of predatory species

In aquatic food webs, approximately what percentage of energy is typically transferred from one trophic level to the next?

• 1%

• 10%

• 50%

• 90%