Question 1

All of the following are abiotic factors, except

Accepted Answer

A)   atmospheric gases.
B)   an animal carcass.
C)   minerals.
D)   water.
E)   light.F) B) and E)
G) B) and D)

Question 2

In a large body of standing water, which area exists between the hypolimnion and the epilimnion?

Accepted Answer

A)   thermocline
B)   photic
C)   limnetic
D)   littoral
E)   profundalF) A) and B)
G) A) and E) A

Question 3

The total amount of water in the hydrologic cycle has decreased over millions of years.

Accepted Answer

A) True 
 B)False

Question 4

Which is mismatched?

Accepted Answer

A)   parasitism - one organism benefits and the other receives no benefit
B)   competition - one organism gives off substances that inhibit or kill other organisms
C)   predator - seeks out and ingests live prey
D)   scavengers - feed on live to dead cells and wastes
E)   omnivores - feed on plants and fleshF) C) and D)
G) All of the above

Question 5

Describe the carbon cycle from the atmosphere to the primary producers and back again.

Accepted Answer

The carbon cycle is the process by which carbon is exchanged between the atmosphere, the oceans, and the Earth's surface. It is essential for maintaining the balance of carbon in the environment and is crucial for the survival of all living organisms.

The cycle begins with carbon dioxide (CO2) in the atmosphere, which is absorbed by plants during photosynthesis. This carbon is then used by the plants to produce organic compounds, such as glucose, which are essential for their growth and development. These plants are known as primary producers because they are the first organisms to convert carbon from the atmosphere into organic matter.

Once the plants have absorbed the carbon, it is then passed on to the consumers that eat the plants, such as herbivores. The carbon is then further transferred to higher-level consumers, such as carnivores, as they consume the herbivores. Throughout this process, some of the carbon is released back into the atmosphere through respiration, as animals and plants break down organic compounds to release energy.

When plants and animals die, their organic matter is broken down by decomposers, such as bacteria and fungi. During this decomposition process, carbon is released back into the atmosphere as CO2 or methane (CH4). This completes the cycle, as the carbon that was once in the atmosphere has now been utilized by primary producers and has returned to the atmosphere through various processes.

Overall, the carbon cycle is a continuous and essential process that maintains the balance of carbon in the environment, supporting the growth and development of all living organisms.

Question 6

The sediment in a lake, composed of organic debris and mud, is termed the

Accepted Answer

A)   photic zone.
B)   benthic zone.
C)   profundal zone.
D)   littoral zone.
E)   limnetic zone.F) A) and C)
G) B) and C)

Question 7

Indicator bacteria are

Accepted Answer

A)   coliforms.
B)   gram-negative rods.
C)   evidence of fecal contamination.
D)   used in water quality tests.
E)   All of these choices are correct.F) A) and D)
G) A) and E)

Question 8

Which of the following is not correct about nitrogen fixation?

Accepted Answer

A)   Some nitrogen-fixing bacteria live free.
B)   Some nitrogen-fixing bacteria live in a symbiotic relationship with plants.
C)   Nitrogen fixation is an aerobic process.
D)   The primary product of nitrogen fixation is ammonium ion, NH4+.
E)   Legumes are plants that are able to fix nitrogen.F) A) and B)
G) B) and C)

Question 9

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Accepted Answer

A)   niches.
B)   habitats.
C)   populations.
D)   communities.
E)   biomes.F) A) and D)
G) A) and E)

Question 10

Discuss and give several examples of the use of microbes in bioremediation.

Accepted Answer

Bioremediation is the use of microorgani...

Question 11

Discuss the specific effects caused by the runoff of organic industrial waste into a freshwater stream.

Accepted Answer

The runoff of organic industrial waste i...

Question 12

Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that help establish an estimate of coliform numbers in the water is called

Accepted Answer

A)   membrane filter method.
B)   most probable number MPN)  procedure.
C)   standard plate count.
D)   coliform determination test.E) A) and B)
F) A) and C)

Question 13

All of the following pertain to red tides, except

Accepted Answer

A)   due to overgrowth of red and brown algae in water.
B)   due to overgrowth of toxin-producing dinoflagellates.
C)   cause paralytic shellfish poisoning.
D)   involve toxin concentrating in shellfish.
E)   humans can become ill from eating the shellfish.F) B) and D)
G) B) and C)

Question 14

The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO2 gas over the last 25 years.

Accepted Answer

A) True 
 B)False

Question 15

Mycorrhizae are the mutualistic partnership between fungi and the roots of certain plants.

Accepted Answer

A) True 
 B)False

Question 16

Some bacteria, such as Desulfovibrio, are able to reduce sulfates to hydrogen sulfide as the final step in the electron transport chain.

Accepted Answer

A) True 
 B)False

Question 17

The conversion of gaseous nitrogen N2)  to the ammonium ion NH4+)  occurs during

Accepted Answer

A)   ammonification.
B)   nitrogen fixation.
C)   photosynthesis.
D)   nitrification.
E)   denitrification.F) All of the above
G) C) and D)

Question 18

The Gaia Theory says that

Accepted Answer

A)   the biosphere contains a diversity of habitats and niches favorable to life because living things have made it that way.
B)   the complementary actions of respiration and photosynthesis have maintained a relatively stable atmospheric pool of carbon dioxide and oxygen.
C)   all living things must obtain nutrients and energy from their environment.
D)   all elements have their origin in a nonliving, long-term reservoir.
E)   ecosystems are open with regard to energy because the sun is constantly renewing them with a renewable source.F) A) and B)
G) B) and D) A

Question 19

Most of the zooplankton and phyoplankton in a lake will be located in the

Accepted Answer

A)   benthic zone.
B)   photic zone.
C)   produndal zone.
D)   littoral zone.
E)   Plankton will be distributed among each of these zones.F) All of the above
G) A) and C)

Question 20

A food web is generally simpler to visualize than a food chain.

Accepted Answer

A) True 
 B)False

Exam 26: Environmental Microbiology

All of the following are abiotic factors, except

Correct Answer
verified

In a large body of standing water, which area exists between the hypolimnion and the epilimnion?

Correct Answer
verified
A

The total amount of water in the hydrologic cycle has decreased over millions of years.

Correct Answer
verified

Which is mismatched?

Correct Answer
verified

Describe the carbon cycle from the atmosphere to the primary producers and back again.

The sediment in a lake, composed of organic debris and mud, is termed the

Correct Answer
verified

Indicator bacteria are

Correct Answer
verified

Which of the following is not correct about nitrogen fixation?

Correct Answer
verified

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Correct Answer
verified

Discuss and give several examples of the use of microbes in bioremediation.

Correct Answer
Answered by ExamLex AI
Bioremediation is the use of microorgani...
View Answer

Discuss the specific effects caused by the runoff of organic industrial waste into a freshwater stream.

Correct Answer
Answered by ExamLex AI
The runoff of organic industrial waste i...
View Answer

Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that help establish an estimate of coliform numbers in the water is called

Correct Answer
verified

All of the following pertain to red tides, except

Correct Answer
verified

The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO₂ gas over the last 25 years.

Correct Answer
verified

Mycorrhizae are the mutualistic partnership between fungi and the roots of certain plants.

Correct Answer
verified

Some bacteria, such as Desulfovibrio, are able to reduce sulfates to hydrogen sulfide as the final step in the electron transport chain.

Correct Answer
verified

The conversion of gaseous nitrogen N₂) to the ammonium ion NH₄⁺) occurs during

Correct Answer
verified

The Gaia Theory says that

Correct Answer
verified
A

Most of the zooplankton and phyoplankton in a lake will be located in the

Correct Answer
verified

A food web is generally simpler to visualize than a food chain.

Correct Answer
verified

Exam 26: Environmental Microbiology

All of the following are abiotic factors, except

Correct AnswerverifiedShow Answer

In a large body of standing water, which area exists between the hypolimnion and the epilimnion?

Correct AnswerverifiedA

The total amount of water in the hydrologic cycle has decreased over millions of years.

Correct AnswerverifiedShow Answer

Which is mismatched?

Correct AnswerverifiedShow Answer

Describe the carbon cycle from the atmosphere to the primary producers and back again.

The sediment in a lake, composed of organic debris and mud, is termed the

Correct AnswerverifiedShow Answer

Indicator bacteria are

Correct AnswerverifiedShow Answer

Which of the following is not correct about nitrogen fixation?

Correct AnswerverifiedShow Answer

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Correct AnswerverifiedShow Answer

Discuss and give several examples of the use of microbes in bioremediation.

Correct AnswerAnswered by ExamLex AIBioremediation is the use of microorgani...View AnswerShow Answer

Discuss the specific effects caused by the runoff of organic industrial waste into a freshwater stream.

Correct AnswerAnswered by ExamLex AIThe runoff of organic industrial waste i...View AnswerShow Answer

Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that help establish an estimate of coliform numbers in the water is called

Correct AnswerverifiedShow Answer

All of the following pertain to red tides, except

Correct AnswerverifiedShow Answer

The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO2 gas over the last 25 years.

Correct AnswerverifiedShow Answer

Mycorrhizae are the mutualistic partnership between fungi and the roots of certain plants.

Correct AnswerverifiedShow Answer

Some bacteria, such as Desulfovibrio, are able to reduce sulfates to hydrogen sulfide as the final step in the electron transport chain.

Correct AnswerverifiedShow Answer

The conversion of gaseous nitrogen N2) to the ammonium ion NH4+) occurs during

Correct AnswerverifiedShow Answer

The Gaia Theory says that

Correct AnswerverifiedA

Most of the zooplankton and phyoplankton in a lake will be located in the

Correct AnswerverifiedShow Answer

A food web is generally simpler to visualize than a food chain.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Bioremediation is the use of microorgani...
View Answer

Correct Answer
Answered by ExamLex AI
The runoff of organic industrial waste i...
View Answer

Correct Answer
verified

Correct Answer
verified

The combustion of fossil fuels, such as coal, oil, and gas, have contributed to the steady increase in atmosphere CO₂ gas over the last 25 years.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The conversion of gaseous nitrogen N₂) to the ammonium ion NH₄⁺) occurs during

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified