Marine Biomes & Wetlands Quiz

Saltwater biomes have around _____% salinity, while freshwater biomes have around 1%.

• 3

• 13

• 30

• 50

The amount of saltwater on the earth’s surface is vastly larger than the amount of freshwater.

The location in which freshwater and saltwater mix at the mouth of a river is known as a(n)

• intertidal zone

• productivity zone

• euphotic zone

• estuary

In terrestrial biomes, the factor limiting photosynthesis is ________, whereas in marine biomes, it is ________.

• light, nutrients

• carbon dioxide, light

• light, oxygen

• nutrients, carbon dioxide

Which of the following is NOT a characteristic of an organism living in the intertidal zone?

• the ability to be submerged underwater

• the ability to photosynthesize with little sunlight

• the ability to securely attach to a substrate

• the ability to tolerate desiccation (drying out)

The portion of the ocean where sunlight is able to penetrate the water is known as

• intertidal zone

• productivity zone

• euphotic zone

• estuary

Which of the following is NOT a condition that would be found in an area of high marine productivity?

• Strong thermoclines

• High levels of nutrients

• Upwelling

• High amounts of phytoplankton

What type of relationship exists between stony marine corals and zooxanthellae?

• commensalistic

• parasitic

• mutualistic

• predatory

Of the following ocean zones, which makes up the greatest percentage of the open ocean?

• euphotic zone

• aphotic zone

• disphotic zone

• photic zone

Which wavelengths of light are able to penetrate deepest into the ocean?

• red

• purple

• blue

• yellow