Exam 32: Microbial Interactions

Many anaerobic gram-negative bacteria are normally found in the duodenum.

The lungs are protected from microorganisms by

An example of microbial ___________ is the ability of Vampirococcus to attach to the outer membrane of its prey and then secrete degradative enzymes that result in the release of the prey's cytoplasmic contents.

The term that refers to those microbes found as symbionts in a short relationship of a nongrowing nature is __________.

Coral bleaching where the photosynthetic endosymbiont is lost or becomes non-functional can be caused by temperature increases as small as 2^oC.

The average adult carries 10 times more microbial cells (10¹⁴)than human cells (average about 10¹³).

Buchnera aphidicola provides ___________ to its aphid host that are essential to the survival of the insect.

In the rumen,the carbohydrate fermentation end products include

The specialized structure in a tube worm in which endosymbiotic,chemolithotrophic bacteria live is called a(n)__________.

Human sweat has antimicrobial activity due to

____________ is a beneficial relationship similar to mutualism,in which the relationship is not obligatory.

Which of the following is not part of the lichen association?

The filamentous bacteria that grow on the dorsal surface of certain polychaete worms

Microbes such as Lactobacillus acidophilus colonize the human vagina by fermenting

The loss of genetic information no longer needed for an intracellular existence by an obligate parasite is called genomic _____________.

In lichens,the fungi send projections of their hyphae across the algal cell wall in order to obtain nutrients from the photosynthetic partner.These projections are called

The rickettsial parasite Wolbachia pipientis can

Under normal circumstances,the microbiota of the skin is kept in check by

Riftia tube worms make a unique kind of hemoglobin to

The oral cavity of humans normally becomes colonized with microorganisms within hours after birth.