Exam 19: Microbial Ecosystems

Which metabolic strategy is MOST common in chemolithotrophic mats?

Which of the following an example of a biofilm?

Which is the CORRECT order of increasing size in soil particles?

Which of the following represents increasing microbial diversity?

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

What is the difference between an organism being piezophilic and piezotolerant?

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

The cells within a biofilm can undergo intra-species signaling; however,inter-species signaling does not occur.

During periods of stratification,transfer between surface and bottom waters is controlled by

The chemical oxygen demand (COD)of a body of water is determined using a(n)

Sudden nutrient perturbations in an environment generally ________ the overall prokaryotic diversity.

Many microbial habitats are unsuitable for plants and animals.

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

Cyclic di-guanosine monophosphate is upregulated as Pseudomonas aeruginosa cells are declining.

The microbial oxygen-consuming capacity of a water sample is called its

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

Purple phototrophic bacteria that use bacteriochlorophyll a are oxygenic.

Ecological theory states that for every organism there is at LEAST one ________,and the microenvironment where the organism is MOST successful is called the ________.

The most abundant prokaryotic organism in the ocean is of the ________ genus.

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