MICR 271 Module 5 Questions with Correct
Answers
microbe
An organism invisible to the naked eye, especially one that causes disease
Where are microbes found?
everywhere
- coldest, driest, windiest ecosystems
- ocean (base of food chain)
- deep sea thermal vents
bioluminescence of marine microbes
- form of communication of microbes
- used to manipulate the behaviour of host organisms
- some bacteria, in symbiotic relationships with their hosts, facilitate searching for prey,
finding mates, deter predators, or help camouflage the host via this
microbes in hydrothermal vents
microbial diversity correlates with habitat diversity
- extreme conditions with immense diversity
- contribute to the food chain in areas of high temp/pressure of ocean floor
marine viruses
- high concentrations of these found in shallow areas around coral reefs
- viral mediated lysis of their hosts releases dissolved organic matter (DOM) and particulate
, organic matter (POM) into the reef water column and the benthic compartment making them
available to other microorganisms and coral
plant microbes
- most associated with roots of plant
- confer with resistance to pathogens in parts of plant above ground
- typically considered commensals
- some can fix nitrogen, can have positive effect on plant
rhizosphere
narrow region of soil that is directly influenced by root secretions and associated soil
microorganisms
commensal microbes
neither affect plant nor pathogen, all active microbes will affect other microbes and through
complex interactions indirectly affect either plant or pathogen
plant roots
exudates and other rhizodeposits stimulate/inhibit various microbes
aboveground plant parts
induction of resistance in belowground plant parts spreads to this area and vice versa
pathogenic microbes
damage the plant through infection or production of phytotoxic compounds
beneficial microbes
Answers
microbe
An organism invisible to the naked eye, especially one that causes disease
Where are microbes found?
everywhere
- coldest, driest, windiest ecosystems
- ocean (base of food chain)
- deep sea thermal vents
bioluminescence of marine microbes
- form of communication of microbes
- used to manipulate the behaviour of host organisms
- some bacteria, in symbiotic relationships with their hosts, facilitate searching for prey,
finding mates, deter predators, or help camouflage the host via this
microbes in hydrothermal vents
microbial diversity correlates with habitat diversity
- extreme conditions with immense diversity
- contribute to the food chain in areas of high temp/pressure of ocean floor
marine viruses
- high concentrations of these found in shallow areas around coral reefs
- viral mediated lysis of their hosts releases dissolved organic matter (DOM) and particulate
, organic matter (POM) into the reef water column and the benthic compartment making them
available to other microorganisms and coral
plant microbes
- most associated with roots of plant
- confer with resistance to pathogens in parts of plant above ground
- typically considered commensals
- some can fix nitrogen, can have positive effect on plant
rhizosphere
narrow region of soil that is directly influenced by root secretions and associated soil
microorganisms
commensal microbes
neither affect plant nor pathogen, all active microbes will affect other microbes and through
complex interactions indirectly affect either plant or pathogen
plant roots
exudates and other rhizodeposits stimulate/inhibit various microbes
aboveground plant parts
induction of resistance in belowground plant parts spreads to this area and vice versa
pathogenic microbes
damage the plant through infection or production of phytotoxic compounds
beneficial microbes
