Exam 23: Major Microbial Habitats and Diversity

Distinguish an ecotype from a species, and provide an example of an ecotype.

Water is held in soil by _________ and________ between soil particles.

Cells within a biofilm excrete an adhesive matrix primarily composed of _________ but also can contain nucleic acids as well as proteins.

The abundance of cyanobacterial mats has greatly declined due to the evolution of

Soils derived from rock weathering are called __________ soils.

An organism living in the bottommost region of a body of water is described as being

Describe three molecular effects high pressure has on the physiology of organisms.

Which of the following can function as intracellular signaling molecules?

Provide a reason why using a microelectrode might not reveal the true picture of how much dissolved oxygen is evolving in a microbial community.

Which of the following is NOT an oxygenic phototrophic microorganism present in marine waters?

Explain three reasons why bacteria form biofilms.

The deep sea is defined as marine water below a depth of

Most Archaea identified in deep- sea sediments are

The formation of soil involves a combination of biological, chemical, and physical processes.

Dental plaque is an example of a________ .

Chemolithotrophic bacteria use________ released from deep- sea hydrothermal vents.

Soil particles are classified based on their size.

Three major environmental extremes of the deep sea are high ________, low ________,and low_ _________.

What advantage do proteorhodopsin- containing organisms have over other heterotrophic microbes in the open ocean?

Cyclic dimeric guanosine monophosphate (c- di- GMP) serves as a messenger molecule in bacterial cells to coordinate a shift from ________ to _________ growth.