Exam 23: Major Microbial Habitats and Diversity

A notorious biofilm former, implicated in cystic fibrosis, is

In the oceans, prokaryotes are outnumbered ten to one by________ .

Archaea in pelagic deep- water are almost exclusively

In a stratified lake, the warmer and less dense layer is called the

To observe specific microorganisms in a soil particle, one can use

Which statement is TRUE about the fluid from the hydrothermal vents?

Which bacterial genus is responsible for producing ferrous iron (Fe²⁺) in groundwater?

The emergence of new microbial species because of geographic isolation is called __________speciation.

All stratified lakes contain a thermocline.

According to bacterial abundance studies done so far on soils, the ___________are generally not in high numbers when compared to other bacterial classes within the Proteobacteria phylum.

Water in the rocks and soils of Earth's subsurface is called _________.

Unlike other cyanobacteria, Prochlorococcus lacks phycobilins.

The physiochemical conditions of a microenvironment, by definition, remain static.

Explain why biofilms are a concern in medicine.

Low return of nutrients in the pelagic zone results in relatively low primary production in the open ocean when compared to freshwater lake systems.

Functional differences can be observed by using 16S rRNA gene phylogenetics of a microbial community.

What is an average concentration of prokaryotic cells along the surface of pelagic water?

Which aquatic habitat contains a pelagic zone?

A population of metabolically related microorganisms is called a(n)________.

The cells within a biofilm can undergo intraspecies signaling, however interspecies signaling does not occur.