G12 NB MC questions Test 1

Which of the following is a primary producer in aquatic ecosystems?

• Zooplankton

• Phytoplankton

• Small fish

• Crustaceans

What is the main reason for the increasing global demand for food from aquatic environments?

• Decline in terrestrial food production

• Increased human population and dietary changes

• Decrease in the cost of aquaculture

• Overfishing of freshwater species

Which zone in a lake ecosystem is characterized by the presence of rooted aquatic plants?

• Limnetic zone

• Profundal zone

• Littoral zone

• Benthic zone

Which of the following is a sustainable strategy for terrestrial food production?

• Increasing monoculture farming

• Using polyculture farming methods

• Expanding meat production

• Relying on chemical fertilizers

What is the primary function of phytoplankton in aquatic ecosystems?

• Consuming zooplankton

• Producing oxygen through photosynthesis

• Decomposing organic matter

• Filtering pollutants from water

Which of the following is a potential environmental impact of unsustainable aquaculture?

• Increased biodiversity

• Reduction in water pollution

• Habitat destruction and pollution from waste

• Decrease in global food demand

What is the main source of energy for phytoplankton?

• Nutrients from the ocean floor

• Sunlight

• Organic matter

• Zooplankton

Which of the following is a characteristic of the Profundal Zone in a lake?

• High levels of sunlight

• High fish population

• Low oxygen levels

• Presence of rooted plants

Which of the following is a method to reduce nutrient runoff in terrestrial food production systems?

• Increasing pesticide use

• Implementing buffer zones

• Expanding monoculture farming

• Using more chemical fertilizers

What is the primary reason for the collapse of wild fisheries?

• Overfishing and habitat destruction

• Increased aquaculture practices

• Decrease in global fish demand

• Improved fishing technology