Aquatic Ecosystems Quiz

What is the primary factor that differentiates marine ecosystems from freshwater ecosystems?

• Sunlight

• Depth

• Salinity

• Temperature

Which of the following organisms is commonly found on sandy beaches?

• Otters

• Starfish

• Seagulls

• Jellyfish

At what depth does sunlight stop supporting algae growth in the open sea?

• 150 meters

• 200 meters

• 100 meters

• 50 meters

Which of the following is a characteristic of rivers in freshwater ecosystems?

• High salinity

• Constant water movement

• Presence of coral reefs

• Deep water

What type of vegetation is commonly found in lagoons?

• Coral

• Weeds

• Seaweed

• Mangroves