Exam 10: Marine Communities

Perhaps the most difficult oceanic habitat is/are .

Organisms with backbones are called .

Pelagic organisms live in the open ocean.

The most important physical factor for intertidal communities is .

Which organism forms colonies of individuals living within a connected framework of skeletons?

Photosynthetic plankton are called phytoplankton and include the diatoms and dinoflagellates.

Desiccation is a threat to organisms living in .

Green sea turtles are the only species that are strictly herbivorous as an adult, feeding on sea grass as their primary diet.

The intertidal zone represents one of the most stressful environments in terms of changing environmental conditions. Explain this comment using specific examples of stresses and how organisms are able to survive in the intertidal zone.

Individuals of representative families in deep water often tend to be much smaller than related individuals in the shallow ocean.