Micro biology

A community of organisms interacting with the nonliving components within a defined space is called an _______________________.

 

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Question 20.5 pts

Microbes play a role as producers, consumers and decomposers.  

Group of answer choices

True

False

 

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Question 30.5 pts

What provides a constant source of energy for the ecosystem?

Group of answer choices

respiration

sunlight

microbes

biochemical cycles

 

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Question 40.5 pts

This planet is constantly being supplied with new sources of essential chemical elements like carbon, nitrogen, sulphur, etc.  

Group of answer choices

True

False

 

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Question 50.5 pts

What organisms make sure that that the essential elements are recycled through the ecosystem?

Group of answer choices

producers

decomposers

consumers

all of the choices are correct

 

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Question 60.5 pts

The organisms that convert energy from the sun into energy in the form of organic matter are the

Group of answer choices

all of the choices are correct

decomposers

consumers

producers

 

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Question 70.5 pts

Carbon dioxide is removed from the atmosphere through photosynthesis.

Group of answer choices

True

False

 

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Question 80.5 pts

Photosynthesis does not occur in the world's oceans.  

Group of answer choices

True

False

 

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Question 90.5 pts

Which of the following activities returns carbon dioxide to the atmosphere?  Choose all that apply.  

Group of answer choices

photosynthesis

decomposition

respiration by organisms

burning fossil fuels like coal and petroleum

 

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Question 100.5 pts

Recycling of what element creates the "rotten egg" smell that often occurs in swamps, marshes and landfills.

Group of answer choices

sulfur

carbon

nitrogen

oxygen

 

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Question 110.5 pts

The only organisms that can perform nitrogen fixation are certain soil bacteria.  

Group of answer choices

True

False

 

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Question 120.5 pts

Water rushing over exposed rocks releases the element, ________________.

 

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Question 130.5 pts

How does phosphorus in the sea get incorporated into the cycle?

Group of answer choices

unicellular algae and other microbes take it up as they replicate

decomposition of dead organisms

fertilizer draining into the sea

photosynthesis by microbes

 

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Question 140.5 pts

The outbreak of what disease led to the construction of a sewer system in London in the mid 1850's?

Group of answer choices

typhoid fever

smallpox

hepatitis

cholera

 

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Question 150.5 pts

What is the first step in sewage treatment?

Group of answer choices

the waste is put in an anaerobic environment

microbes break down solid organic material

chlorine is added

water is separated from solid waste

 

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Question 160.5 pts

Both aerobic and anaerobic bacteria contribute to the breakdown of waste during sewage treatment.  

Group of answer choices

True

False

 

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Question 170.5 pts

What is the last step performed before water from a sewage treatment facility is released into a stream or river?

Group of answer choices

flucculation

chlorination

aeration

filtration

 

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Question 180.5 pts

The solid material end product of sewage treatment is called ______________________.

 

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Question 190.5 pts

The plaque on your teeth is an example of a bacterial ___________________.

 

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Question 200.5 pts

Adding phosphorus to the soil to promote the growth of oil-consuming bacteria is an example of

Group of answer choices

biofilm formation

decomposition

biostimulation

bioaugmentation

 

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Question 210.5 pts

Potable water is

Group of answer choices

safe to drink

contaminated

from a sink

from a stream

 

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Question 220.5 pts

If a body of water contains high levels of coliform bacteria, what does this likely mean?

Group of answer choices

none of the choices are correct

it is safe to drink

it is contaminated with bacteria from a water treatment facility

it contains bacteria from animal feces

 

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Question 230.5 pts

What leads to death of fish when a river gets polluted?

Group of answer choices

the sewage in the water kills the fish

the algal population increases and produces toxins

the increase in microbes leads to a decrease in oxygen in the water

the increase in bacteria are typically pathogens that kill the fish

 

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Question 240.5 pts

What are the steps in water purification?  Choose all that apply.

Group of answer choices

filtration

chlorination

fluoridation

sedimentation