Exam 31: Microorganisms in Terrestrial Ecosystems

Porous geological structures below the plant root zone where water flows are known as glaciated subterranean lakes.

Molecular techniques have shown that Cyanobacteria are not present in soil.

The bacterial genera that produces pigments which protect plant leaves from UV irradiation is ________.

Which of the following statements is correct?

A unique feature of terrestrial filamentous fungi not found in aquatic fungi is

Which of the following are associated with the process of stem nodulation?

The plant leaf surface is called the rhizosphere.

Oxygen diffuses equally well through waterlogged soil and dry soil.

The vast majority of microorganisms found in soils have been successfully cultured in the laboratory.

Except for a shallow surface layer,the earth's crust is known to be free of microorganisms.

Microbial processes take place in

A major organism involved in associative nitrogen fixation in the rhizosphere of many plants is ________.

Geosmin,which contributes to the characteristic earthy odor of soils,is produced primarily by the genus ________.

A carbon to nitrogen (C/N)ratio of 20 or less in soil results in the loss of soluble nitrogen from the system.

Ionized ammonia applied to soil is effectively retained because clays in the soil have a charge that is ______.

An organism found in the deep hot biosphere that used hydrogen as an electron donor and sulfate as a terminal electron acceptor would be categorized as which of the following?

Biotrophic fungi would be most likely to consume which type of plant material?

Which of the following is inconsistent with the current understanding of how plants and microbes interact with each other?

Mycorrhizae are formed by the association of plants with ________.

In the shallow subsurface,surface waters often move through ________,which are porous geological structures below the plant root zone.