Exam 14: The Benthos: Living on the Sea Floor

Sessile organisms live attached to the seafloor.

Marine vascular flowering plants include all of the following except ________.

The stable conditions of deep benthic environments seem to favor ________ infaunal organisms.

Vent communities have been discovered making use of many energy sources, including all of the following except ________.

Eel grass is a marine plant.

Human activities are among the greatest threats to the world's coral reefs.

Few algae are found growing on gravel and sand beaches.

Zooxanthellae are ________.

Dessication is the biggest issue for rocky shore benthos living in the ________.

The stem is the part of seaweeds that connects the blade to the holdfast.

Water must be warmer than ________ degrees Centigrade to support a reef of corals with zooxanthellae.

In Washington State, the ________ acts as a keystone predator; when removed, biodiversity ________ .

Seafloor organisms modify their habitat and create new habitats for other organisms.

Macroalgae/seaweeds can be best differentiated from true plants because macroalgae/seaweeds ________.

Which organisms burrow into the deep-ocean muds in a process called bioturbation?

Common deep-sea vent communities include all of the following except ________.

Zooxanthellae are highly specialized cyanobacteria that form a symbiotic relationship with corals.

Episodes of coral bleaching have become more frequent and more severe in the last 20 years.

Benthic organisms living in the bottoms of trenches live in the ________ zone.

Macroalgae take advantage of surface/volume ratios by exposing wide, flattened blades to sunlight and nutrient-rich water.