This animal is an example of

• benthos
• plankton
• nekton
• decomposer

__________ would be a benthos organism.

• shark
• sea turtle
• coral
• sting ray

Which of the following is an example of a MARINE ecosystem?

• Lake
• Coral Reef
• River
• Swamp

Which of the following is an example of a FRESHWATER ecosystem?

• Lake
• Stream
• Pond
• All of the Above

Most plants and animals can be found in the __________ zone of a lake where there is sunlight.

• benthic
• littoral
• nekton
• plankton

Why are wetlands important?

• they control flooding by absorbing water
• they filter pollutants from water
• they are home to many species of plants and animals
• ALL of the answer choices are correct

Which is NOT a chemical or physical factor that affects where aquatic organisms live?

• precipitation
• temperature
• oxygen
• sunlight

__________ are very productive because they contain many nutrients which come from rivers and oceans.

• salt marshes
• coral reef
• estuaries
• mangrove swamps

Which of the following groups of aquatic organisms are dependent on the sun to produce food for themselves?

• nekton
• zooplankton
• benthos
• phytoplankton

Aquatic ecosystems are divided into _____ and ____.

• salt water, marine water
• marine water, freshwater
• oceans, lakes
• swamps, marshes