Question 1

Species richness is an important measure of diversity in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 2

Mercury released from coal-burning power plants would be at the highest concentration in

Accepted Answer

A)  the phytoplankton.
B)  eagles that eat the walleye.
C)  the zooplankton.
D)  the minnows.
E)  the walleyE.F) A) and E)
G) A) and D)

Question 3

Carbon returns to the atmosphere

Accepted Answer

A)  as carbon dioxide.
B)  from respiration of plants.
C)  by the burning of fossil fuels.
D)  from respiration of animals.
E)  All answers are correct.F) A) and B)
G) A) and C)

Question 4

As you climb the mountain,why are the biomes changing?

Accepted Answer

A)  The air is thinner.
B)  The latitude is changing.
C)  More rain falls in a rain shadow.
D)  Some animals live better at higher elevations.
E)  It is colder.F) B) and E)
G) B) and D)

Question 5

What is a challenge that organisms living in an intertidal zone face that other aquatic organisms normally do not face?

Accepted Answer

A)  damage from pollution
B)  changes in temperature at different depths
C)  movement of water
D)  light penetrating only through the photic zone
E)  daily changes in water depthF) A) and B)
G) All of the above

Question 6

Some scientists predict that as atmospheric carbon dioxide levels increase,the pH of the oceans will drop,threatening coral and organisms with shells.What is the best explanation for this hypothesis?

Accepted Answer

A)  Carbon dioxide combines with water to form a base.
B)  Carbon dioxide combines with water to form an acid.
C)  As the pH of the ocean decreases,more carbon dioxide is released into the atmosphere.
D)  As the pH of the ocean increases,more carbon dioxide is released into the atmosphere.
E)  As the oceans warm,more water is evaporated,lowering the pH of the remaining water.F) C) and E)
G) B) and D)

Question 7

If a species makes up a small portion of the community by weight,yet exerts a disproportionate influence on community diversity,what would it be called?

Accepted Answer

A)  keystone species
B)  cornerstone species
C)  capstone species
D)  flagstone species
E)  No answer is correct.F) B) and D)
G) D) and E)

Question 8

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Accepted Answer

A)  Plants consume carbon dioxide from the atmosphere during photosynthesis.
B)  Plants release carbon dioxide into the atmosphere during photosynthesis.
C)  Plants consume carbon dioxide from the atmosphere during respiration.
D)  Plants release carbon dioxide into the atmosphere during respiration.
E)  No answer is correct.F) A) and B)
G) A) and E)

Question 9

The ______ states that two species cannot coexist indefinitely in the same niche.

Accepted Answer

A)  endosymbiotic theory
B)  zonal exclusion theory
C)  co-inclusion principle
D)  second law of thermodynamics
E)  competitive exclusion principleF) B) and E)
G) A) and B)

Question 10

If you were a soil scientist looking at a soil sample labelled "tropical rain forest," which trait would make you think that someone had mislabeled the sample?

Accepted Answer

A)  warm climate
B)  nutrient-rich soil
C)  a year-round growing season for plants
D)  a tremendous diversity of animal life
E)  a location near the equatorF) B) and E)
G) A) and C)

Question 11

Scientists observed that over the past 40 years,marmots are located at increasing elevations on mountains.What is the best explanation for this observation?

Accepted Answer

A)  The marmots are adapting to the cold temperatures.
B)  Other species are competing with the marmots for their normal habitat.
C)  More snow and rain is falling at the top of the mountains.
D)  It is becoming colder at the top of the mountains.
E)  It is becoming warmer at the top of the mountains.F) B) and C)
G) A) and E)

Question 12

Which of the following is NOT an abiotic component or condition of an ecosystem?

Accepted Answer

A)  water
B)  archaea
C)  rock
D)  salinity
E)  temperatureF) D) and E)
G) B) and D)

Question 13

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",panic grass is a(n)

Accepted Answer

A)  monocot.
B)  dicot.
C)  algae.
D)  seedless plant.
E)  bryophytE.F) A) and D)
G) D) and E)

Question 14

A network of interconnected food chains is a food web.

Accepted Answer

A) True 
 B)False

Question 15

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what adaptations would panic grass growing at 65 ∘\circ∘ C need to employ to avoid dehydration?

Accepted Answer

A)  Transpiration would increase.
B)  Uptake of water through the phloem would increase.
C)  Transport of sugars through the xylem would decrease.
D)  Their stomata would be closeD.
E)  Their flowers would open. F) A) and D)
G) C) and D)

Question 16

You are blindfolded and led to dry landscape where you see wind picking up sand and grinding it against a cliff.You are asked which biogeochemical cycle could be observed,and you answer that it is the _______ cycle.

Accepted Answer

A)  phosphorus
B)  nitrogen
C)  water
D)  No answer is correct.
E)  carbonF) B) and D)
G) D) and E)

Question 17

Since it is a virus which cooperatively helps grass to grow at 65 ∘\circ∘ C,based on what could the virus be detected?

Accepted Answer

A)  by the presence of antibodies to the virus
B)  by the presence of double-stranded RNA
C)  by signs of infection
D)  by the ability to grow at 65 ∘\circ∘ C
E)  by the presence of viral proteins F) D) and E)
G) C) and E)

Question 18

The yearly rainfall of a desert biome is

Accepted Answer

A)  150 to 200 centimeters per year.
B)  1 to 5 centimeters per year.
C)  less than 20 centimeters per year.
D)  more than 200 centimeters per year.
E)  50 to 100 centimeters per year.F) A) and B)
G) B) and E)

Question 19

Organisms that obtain their energy from producers or other consumers are

Accepted Answer

A)  autotrophs and producers.
B)  producers and heterotrophs.
C)  autotrophs.
D)  producers.
E)  heterotrophs.F) A) and C)
G) C) and D)

Question 20

Species evenness is an important measure of diversity in an ecosystem.

Accepted Answer

A) True 
 B)False

Exam 19: Communities and Ecosystems

Some scientists predict that as atmospheric carbon dioxide levels increase,the pH of the oceans will drop,threatening coral and organisms with shells.What is the best explanation for this hypothesis?

Correct AnswerverifiedShow Answer

If you were a soil scientist looking at a soil sample labelled "tropical rain forest," which trait would make you think that someone had mislabeled the sample?

Correct AnswerverifiedShow Answer

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Correct AnswerverifiedShow Answer

Carbon returns to the atmosphere

Correct AnswerverifiedShow Answer

Scientists observed that over the past 40 years,marmots are located at increasing elevations on mountains.What is the best explanation for this observation?

Correct AnswerverifiedShow Answer

You are blindfolded and led to dry landscape where you see wind picking up sand and grinding it against a cliff.You are asked which biogeochemical cycle could be observed,and you answer that it is the _______ cycle.

Correct AnswerverifiedShow Answer

Which of the following is NOT an abiotic component or condition of an ecosystem?

Correct AnswerverifiedShow Answer

Since it is a virus which cooperatively helps grass to grow at 65 ∘\circ∘ C,based on what could the virus be detected?

Correct AnswerverifiedShow Answer

A network of interconnected food chains is a food web.

Correct AnswerverifiedShow Answer

Species evenness is an important measure of diversity in an ecosystem.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",panic grass is a(n)

Correct AnswerverifiedShow Answer

Organisms that obtain their energy from producers or other consumers are

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what adaptations would panic grass growing at 65 ∘\circ∘ C need to employ to avoid dehydration?

Correct AnswerverifiedShow Answer

The yearly rainfall of a desert biome is

Correct AnswerverifiedShow Answer

If a species makes up a small portion of the community by weight,yet exerts a disproportionate influence on community diversity,what would it be called?

Correct AnswerverifiedShow Answer

What is a challenge that organisms living in an intertidal zone face that other aquatic organisms normally do not face?

Correct AnswerverifiedShow Answer

The ______ states that two species cannot coexist indefinitely in the same niche.

Correct AnswerverifiedShow Answer

Species richness is an important measure of diversity in an ecosystem.

Correct AnswerverifiedShow Answer

As you climb the mountain,why are the biomes changing?

Correct AnswerverifiedShow Answer

Mercury released from coal-burning power plants would be at the highest concentration in

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Since it is a virus which cooperatively helps grass to grow at 65^$\circ$C,based on what could the virus be detected?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what adaptations would panic grass growing at 65^$\circ$C need to employ to avoid dehydration?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified