EVR1001 EXAM 2 | (LATEST EXAM 2025/2026) QUESTIONS AND CORRECT
ANSWERS | ALREADY GRADED A+ | VERIFIED ANSWERS
Why do we classify lionfish populations near the eastern United States as an invasive species?
What suggests that these new populations are not an expansion of the lionfish's natural range?
a) Lionfish eat only a few specific types of algae that live in isolated regions of the Pacific. If
lionfish spread much beyond their native Pacific home, they would have nothing to eat.
b) Lionfish are native to the tropical Pacific. There are no natural water routes of warm water
between the Pacific and Atlantic oceans.
c) Lionfish are not good swimmers and have no other mechanisms to spread their populations
over great distances.
d) Lionfish are native to cold waters near the tip of South America. They could not survive in the
warmer waters between their native areas and the colder waters of the east coast of the United
States. So, it is very unlikely that these South American populations naturally spread north. -
(Correct Answer)-b) Lionfish are native to the tropical Pacific. There are no natural water
routes of warm water between the Pacific and Atlantic oceans.
Based upon what we are learning about the lionfish diet, what is most likely going to happen to
Caribbean coral reefs invaded by lionfish?
A) As lionfish stir up the bottom sediments searching for food, the water will be increasingly
cloudy. Cloudy water will hurt the growth of algae and corals growing in the reef.
B) There will be fewer algae eating fish. More algae will grow over and damage corals.
C) Lionfish diets are specific to just a few species of clams. These clams may go extinct in the
coral reefs where lionfish have invaded.
, 2
D) The alga populations growing on and near the reef will be greatly reduced, increasing the
growth of corals. - (Correct Answer)-B) There will be fewer algae eating fish. More algae
will grow over and damage corals.
What characteristics of lionfish contribute to their ability to spread and become established in
new areas?
A) Lionfish are very good at avoiding predators by hiding in small cracks. Their color is also an
excellent form of camouflage. So, lionfish can spread to new locations without being detected.
B) A single lionfish female may produce up to 2 million eggs a year. The eggs float for up to a
month, spreading the lionfish populations.
C) Lionfish typically migrate in large schools to other reefs, where they breed together producing
giant egg masses, which cling to the bottom of the coral reef.
D) Lionfish are specialists, consuming just a few types of shrimp, which are widespread in the
Caribbean. - (Correct Answer)-B) A single lionfish female may produce up to 2 million eggs
a year. The eggs float for up to a month, spreading the lionfish populations.
How did the fish biologists determine the diet of lionfish in the regions where the lionfish have
invaded?
A) Divers spent thousands of hours watching lionfish around the coral reefs and simply recorded
the types of food that the lionfish ate.
B) Biologists kept lionfish in laboratories and experimented with what types of food these
captive lionfish would eat.
, 3
C) The fish biologists used many different types of bait to fish for lionfish around coral reefs.
The baits that worked best are most likely a part of the lionfish diet.
D) Biologists examined the contents of the stomachs of lionfish caught in the wild. - (Correct
Answer)-D) Biologists examined the contents of the stomachs of lionfish caught in the wild.
Based upon what we are learning about invasive lionfish populations in the Caribbean and along
the Atlantic coast of the United States, these lionfish populations __________.
A) can be eliminated by setting traps widely in these regions
B) can be eliminated by holding regular lionfish derbies encouraging people to catch as many
lionfish as possible
C) cannot be eliminated by any means currently known
D) can be controlled by introducing a new lionfish predator from the region where lionfish
naturally occur - (Correct Answer)-C) cannot be eliminated by any means currently known
Human activities, including fossil fuel combustion, farming, and deforestation, are known to
increase atmospheric levels of greenhouse gases such as carbon dioxide, methane, and nitrous
oxide. Measurable warming of Earth due to these gases can alter ecosystem dynamics. In
addition to the direct climatic effects on organisms within biomes, warming can melt permafrost
in the tundra and increase precipitation in arctic areas. Global warming also can increase sea
surface temperatures, melting sea ice in the Arctic and increasing the intensity of hurricanes in
temperate and tropical coastal areas. Within communities, climatic change can shift
interdependent species "out-of-sync," potentially causing indirect loss of species.
, 4
Global warming has been hypothesized to cause many plants to flower earlier. If bees and other
pollinators begin the search for food earlier in response to this, this would represent ________
within - (Correct Answer)-C) coevolution
A restoration ecologist may do all of the following EXCEPT:
A) remove invasive European buckthorn from a Minnesota forest.
B) plant trees in an area that has been mined.
C) place levees in sensitive areas to prevent seasonal flooding.
D) recreate a wetland in an area that had been drained for farming.
E) plant a prairie in an area that has been farmed. - (Correct Answer)-C) place levees in
sensitive areas to prevent seasonal flooding.
________________ follows a disturbance so severe that no vegetation or soil life remains from
the community that had occupied the site.
A) Primary succession
B) Resistance
C) Pioneer succession
D) Secondary succession - (Correct Answer)-A) Primary succession
ANSWERS | ALREADY GRADED A+ | VERIFIED ANSWERS
Why do we classify lionfish populations near the eastern United States as an invasive species?
What suggests that these new populations are not an expansion of the lionfish's natural range?
a) Lionfish eat only a few specific types of algae that live in isolated regions of the Pacific. If
lionfish spread much beyond their native Pacific home, they would have nothing to eat.
b) Lionfish are native to the tropical Pacific. There are no natural water routes of warm water
between the Pacific and Atlantic oceans.
c) Lionfish are not good swimmers and have no other mechanisms to spread their populations
over great distances.
d) Lionfish are native to cold waters near the tip of South America. They could not survive in the
warmer waters between their native areas and the colder waters of the east coast of the United
States. So, it is very unlikely that these South American populations naturally spread north. -
(Correct Answer)-b) Lionfish are native to the tropical Pacific. There are no natural water
routes of warm water between the Pacific and Atlantic oceans.
Based upon what we are learning about the lionfish diet, what is most likely going to happen to
Caribbean coral reefs invaded by lionfish?
A) As lionfish stir up the bottom sediments searching for food, the water will be increasingly
cloudy. Cloudy water will hurt the growth of algae and corals growing in the reef.
B) There will be fewer algae eating fish. More algae will grow over and damage corals.
C) Lionfish diets are specific to just a few species of clams. These clams may go extinct in the
coral reefs where lionfish have invaded.
, 2
D) The alga populations growing on and near the reef will be greatly reduced, increasing the
growth of corals. - (Correct Answer)-B) There will be fewer algae eating fish. More algae
will grow over and damage corals.
What characteristics of lionfish contribute to their ability to spread and become established in
new areas?
A) Lionfish are very good at avoiding predators by hiding in small cracks. Their color is also an
excellent form of camouflage. So, lionfish can spread to new locations without being detected.
B) A single lionfish female may produce up to 2 million eggs a year. The eggs float for up to a
month, spreading the lionfish populations.
C) Lionfish typically migrate in large schools to other reefs, where they breed together producing
giant egg masses, which cling to the bottom of the coral reef.
D) Lionfish are specialists, consuming just a few types of shrimp, which are widespread in the
Caribbean. - (Correct Answer)-B) A single lionfish female may produce up to 2 million eggs
a year. The eggs float for up to a month, spreading the lionfish populations.
How did the fish biologists determine the diet of lionfish in the regions where the lionfish have
invaded?
A) Divers spent thousands of hours watching lionfish around the coral reefs and simply recorded
the types of food that the lionfish ate.
B) Biologists kept lionfish in laboratories and experimented with what types of food these
captive lionfish would eat.
, 3
C) The fish biologists used many different types of bait to fish for lionfish around coral reefs.
The baits that worked best are most likely a part of the lionfish diet.
D) Biologists examined the contents of the stomachs of lionfish caught in the wild. - (Correct
Answer)-D) Biologists examined the contents of the stomachs of lionfish caught in the wild.
Based upon what we are learning about invasive lionfish populations in the Caribbean and along
the Atlantic coast of the United States, these lionfish populations __________.
A) can be eliminated by setting traps widely in these regions
B) can be eliminated by holding regular lionfish derbies encouraging people to catch as many
lionfish as possible
C) cannot be eliminated by any means currently known
D) can be controlled by introducing a new lionfish predator from the region where lionfish
naturally occur - (Correct Answer)-C) cannot be eliminated by any means currently known
Human activities, including fossil fuel combustion, farming, and deforestation, are known to
increase atmospheric levels of greenhouse gases such as carbon dioxide, methane, and nitrous
oxide. Measurable warming of Earth due to these gases can alter ecosystem dynamics. In
addition to the direct climatic effects on organisms within biomes, warming can melt permafrost
in the tundra and increase precipitation in arctic areas. Global warming also can increase sea
surface temperatures, melting sea ice in the Arctic and increasing the intensity of hurricanes in
temperate and tropical coastal areas. Within communities, climatic change can shift
interdependent species "out-of-sync," potentially causing indirect loss of species.
, 4
Global warming has been hypothesized to cause many plants to flower earlier. If bees and other
pollinators begin the search for food earlier in response to this, this would represent ________
within - (Correct Answer)-C) coevolution
A restoration ecologist may do all of the following EXCEPT:
A) remove invasive European buckthorn from a Minnesota forest.
B) plant trees in an area that has been mined.
C) place levees in sensitive areas to prevent seasonal flooding.
D) recreate a wetland in an area that had been drained for farming.
E) plant a prairie in an area that has been farmed. - (Correct Answer)-C) place levees in
sensitive areas to prevent seasonal flooding.
________________ follows a disturbance so severe that no vegetation or soil life remains from
the community that had occupied the site.
A) Primary succession
B) Resistance
C) Pioneer succession
D) Secondary succession - (Correct Answer)-A) Primary succession
