Benthic and Pelagic Realms Quiz

Which zone of the benthic realm is always covered with water and extends to the edge of the continental shelf?

• Supralittoral zone

• Eulittoral zone

• Sublittoral zone

• Hadal zone

What is the characteristic feature of the abyssal zone in the deep sea system?

• It is always exposed and only immersed during storms.

• It is exploited by fishermen.

• It has no light and is less biologically productive.

• It is characterized by great variations in salinity, temperature, and other environmental conditions.

Which zone in the pelagic realm is known as the "twilight" area where the remaining 1% of light penetrates?

• Euphotic zone

• Dysphotic zone

• Aphotic zone

• Neritic system

What is the depth range of the bathyal zone in the deep sea system?

• 200-2000 meters

• 2000-6000 meters

• Deeper than 6000 meters

• Down to 200 m in clear water

Which organisms are typical of the eulittoral zone of the benthic realm?

• Organisms adapted to life of extreme darkness, cold, and pressure

• Scavengers with big mouths and teeth

• Organisms well adapted to living in areas with alternating wet and dry periods

• Organisms that live in the shallow water region that surrounds most continents and islands

Which of the following is NOT one of the five vertical habitats that the ocean can be separated into?

• Epipelagic

• Mesopelagic

• Hadopelagic

• Limnetic

What is the term used to describe the nature of life in a particular habitat as determined by the abiotic part of the environment?

• Ecology

• Benthic

• Abiotic

• Biotic

Which of the following is considered the base of the food chain in marine ecosystems?

• Zooplankton

• Phytoplankton

• Benthic organisms

• Dinoflagellates

What type of organisms are known as "ocean bottom dwellers"?

• Phytoplankton

• Zooplankton

• Benthic organisms

• Epipelagic organisms

Which zone do most phytoplankton live in?

• Aphotic zone

• Bathypelagic zone

• Euphotic zone

• Hadopelagic zone