ENVS 1126 Quizzes
The concept of sustainable development includes - ANS-the needs of future generations
THE EXPERIMENT
Researchers wanted to determine if pesticide T1 was effective at killing slugs that typically
invade cornfields. Two five-acre cornfields located two miles apart were chosen. The cornfield to
the west was sprayed only with water. The cornfield on the east received the same amount of
water with a 10% solution of pesticide T1. Slugs in the fields were counted every week for 10
weeks.
RESULTS
West field treated only with water:
The number of slugs in the west field doubled after ten weeks.
East field treated with water and pesticide T1:
The number of slugs in the east field declined by 50% after 10 weeks.
What was the experimental variable in the above experiment? - ANS-pesticide T1
Which field was the control group in the above experiment? - ANS-The west field was the
control group.
Which of the following is a reasonable conclusion based on the result of the experiment
described above? - ANS-
Which one of the following ecosystem services has been enhanced most by human use? -
ANS-crops
Inorganic compounds generally do not have - ANS-carbon-hydrogen bonds or carbon-carbon
bonds.
Which of the following are products of photosynthesis? - ANS-oxygen and sugar
Many strategies have been used to control leafy spurge, including the deliberate introduction of
different species of flea beetles that feed on leafy spurge. Each flea beetle female may lay about
200 eggs in her only year of life. In places where flea beetle introductions have quickly
established large populations that have grown and stabilized, the population growth of these
beetles most likely looked like - ANS-an S-shaped curve.
Natural organic compounds typically consist of some combination of oxygen, nitrogen,
phosphorus, and/or sulfur and - ANS-carbon
,On a vacation, you spend much of the day walking along the water's edge on an ocean beach
soaking up the sun. The place where you are walking is a good example of a/an - ANS-ecotone.
Organisms with a narrow range of temperature tolerance would most likely be found in - ANS-
Plants such as leafy spurge can double their population size every year in part because of their
efficient production of large amounts of seeds. Populations that can double every year, such as
leafy spurge, - ANS-exhibit exponential growth as they spread to new regions.
As global climate change warms certain mountain ranges, the temperature optima for the insect
species living on the mountain is causing these insects to - ANS-move farther up the mountain.
Raul works in a pet shop that raises baby turtles and the store recently began using a different
turtle food. The babies that were fed the new food seemed to grow well for the first few months,
but as time passed Raul noticed these turtles' shells were softer and more fragile. Raul
suggests to the manager that the turtles might not be getting enough calcium. If this is true for
this turtle, dietary calcium is - ANS-a limiting factor
Resources for seagulls living along an ocean shore would include - ANS-nesting sites
Some beetles escape from a ship and fly to a small island covered with grass but with no trees
or beetle predators. As the beetles feed, they destroy all the grasses. But with abundant food,
the beetle population soars, doubling in size every month. After about a year, the population
crashes as thousands of beetles have destroyed almost all of the plants and there is little left to
feed the large population. This scenario best illustrates - ANS-exponential growth followed by a
population crash.
Some birds have been seen to consume certain soils in what is called geophagy. In some
cases, the soils help the birds digest toxins that occur in their diets. These birds eating soil
represent a member of the - ANS-biosphere consuming a component of the lithosphere.
The carbon used in photosynthesis by land plants to form the sugars of plant tissues is mostly
returned to the air because of - ANS-cellular respiration.
The little blue heron (Egretta caerulea) inhabits southern Louisiana year-round. Which of the
following about the scientific name of the little blue heron is true? - ANS-both parts of the name
are necessary to designate the little blue heron.
Why does exercise make you warmer? - ANS-Glucose oxidation speeds up during exercise to
power muscular activities, and as a byproduct, extra heat is generated.
A biologist studying a lake determines that the fish feed on shrimp that feed on the bacteria.
This food chain represents a - ANS-second order consumer eating a first order consumer, which
then eats a producer.
, A form of a biome is largely predicted by its - ANS-temperature and rainfall.
Bacterial denitrification converts NO3- to ______ whereas bacterial nitrogen fixation converts
N2 to ______. - ANS-N2 // NH3
Biodiversity has three components: - ANS-Species diversity, genetic diversity in species, and
ecosystem diversity
Biodiversity in the world is - ANS-
Cattle and termites both have symbiotic microorganisms living in their digestive tracts that help
these animals by - ANS-digesting cellulose.
Deep in the ocean off the shore of Japan are communities nestled around hydrothermal vents,
where super-heated water springs from the bottom of the ocean. No sunlight ever penetrates to
these deep regions. In these communities, bacteria have special enzymes that allow them to
form organic matter by chemosynthesis. These communities frequently have giant tube worms,
clams, shrimp, and many other organisms clustered together. Based on this information, which
of the following is true about hydrothermal vent communities? - ANS-There is no
photosynthesis, but heat drives chemosynthetic producers.
Density-independent factors such as earthquakes and hurricanes are - ANS-abiotic factors that
are not involved in maintaining a population near its equilibrium.
In general food webs consist of either consumers or producers. - ANS-False
Invasive species are dangerous because - ANS-the native species have not evolved with these
organisms.
Lake trout are a very popular game fish that require deep, cold and high-quality water. The lake
trout grows and matures slowly compared to most other fish but can exhibit logistic growth
under ideal conditions. A region in Utah has an abundant population of native lake trout that
thrive in its lakes. The region decided to adopt sport fishing regulations to maintain the
population because of the importance of the tourism it attracts to the local economy. What would
be the best level to maintain the population of lake trout while allowing sport fishing? - ANS-at
50% its carrying capacity.
Large body size is a characteristic of a K-selected species. - ANS-true
Over the past 12,000 years, the greatest loss of biological wealth has resulted from the -
ANS-conversion of natural ecosystems to modern agriculture.
The concept of sustainable development includes - ANS-the needs of future generations
THE EXPERIMENT
Researchers wanted to determine if pesticide T1 was effective at killing slugs that typically
invade cornfields. Two five-acre cornfields located two miles apart were chosen. The cornfield to
the west was sprayed only with water. The cornfield on the east received the same amount of
water with a 10% solution of pesticide T1. Slugs in the fields were counted every week for 10
weeks.
RESULTS
West field treated only with water:
The number of slugs in the west field doubled after ten weeks.
East field treated with water and pesticide T1:
The number of slugs in the east field declined by 50% after 10 weeks.
What was the experimental variable in the above experiment? - ANS-pesticide T1
Which field was the control group in the above experiment? - ANS-The west field was the
control group.
Which of the following is a reasonable conclusion based on the result of the experiment
described above? - ANS-
Which one of the following ecosystem services has been enhanced most by human use? -
ANS-crops
Inorganic compounds generally do not have - ANS-carbon-hydrogen bonds or carbon-carbon
bonds.
Which of the following are products of photosynthesis? - ANS-oxygen and sugar
Many strategies have been used to control leafy spurge, including the deliberate introduction of
different species of flea beetles that feed on leafy spurge. Each flea beetle female may lay about
200 eggs in her only year of life. In places where flea beetle introductions have quickly
established large populations that have grown and stabilized, the population growth of these
beetles most likely looked like - ANS-an S-shaped curve.
Natural organic compounds typically consist of some combination of oxygen, nitrogen,
phosphorus, and/or sulfur and - ANS-carbon
,On a vacation, you spend much of the day walking along the water's edge on an ocean beach
soaking up the sun. The place where you are walking is a good example of a/an - ANS-ecotone.
Organisms with a narrow range of temperature tolerance would most likely be found in - ANS-
Plants such as leafy spurge can double their population size every year in part because of their
efficient production of large amounts of seeds. Populations that can double every year, such as
leafy spurge, - ANS-exhibit exponential growth as they spread to new regions.
As global climate change warms certain mountain ranges, the temperature optima for the insect
species living on the mountain is causing these insects to - ANS-move farther up the mountain.
Raul works in a pet shop that raises baby turtles and the store recently began using a different
turtle food. The babies that were fed the new food seemed to grow well for the first few months,
but as time passed Raul noticed these turtles' shells were softer and more fragile. Raul
suggests to the manager that the turtles might not be getting enough calcium. If this is true for
this turtle, dietary calcium is - ANS-a limiting factor
Resources for seagulls living along an ocean shore would include - ANS-nesting sites
Some beetles escape from a ship and fly to a small island covered with grass but with no trees
or beetle predators. As the beetles feed, they destroy all the grasses. But with abundant food,
the beetle population soars, doubling in size every month. After about a year, the population
crashes as thousands of beetles have destroyed almost all of the plants and there is little left to
feed the large population. This scenario best illustrates - ANS-exponential growth followed by a
population crash.
Some birds have been seen to consume certain soils in what is called geophagy. In some
cases, the soils help the birds digest toxins that occur in their diets. These birds eating soil
represent a member of the - ANS-biosphere consuming a component of the lithosphere.
The carbon used in photosynthesis by land plants to form the sugars of plant tissues is mostly
returned to the air because of - ANS-cellular respiration.
The little blue heron (Egretta caerulea) inhabits southern Louisiana year-round. Which of the
following about the scientific name of the little blue heron is true? - ANS-both parts of the name
are necessary to designate the little blue heron.
Why does exercise make you warmer? - ANS-Glucose oxidation speeds up during exercise to
power muscular activities, and as a byproduct, extra heat is generated.
A biologist studying a lake determines that the fish feed on shrimp that feed on the bacteria.
This food chain represents a - ANS-second order consumer eating a first order consumer, which
then eats a producer.
, A form of a biome is largely predicted by its - ANS-temperature and rainfall.
Bacterial denitrification converts NO3- to ______ whereas bacterial nitrogen fixation converts
N2 to ______. - ANS-N2 // NH3
Biodiversity has three components: - ANS-Species diversity, genetic diversity in species, and
ecosystem diversity
Biodiversity in the world is - ANS-
Cattle and termites both have symbiotic microorganisms living in their digestive tracts that help
these animals by - ANS-digesting cellulose.
Deep in the ocean off the shore of Japan are communities nestled around hydrothermal vents,
where super-heated water springs from the bottom of the ocean. No sunlight ever penetrates to
these deep regions. In these communities, bacteria have special enzymes that allow them to
form organic matter by chemosynthesis. These communities frequently have giant tube worms,
clams, shrimp, and many other organisms clustered together. Based on this information, which
of the following is true about hydrothermal vent communities? - ANS-There is no
photosynthesis, but heat drives chemosynthetic producers.
Density-independent factors such as earthquakes and hurricanes are - ANS-abiotic factors that
are not involved in maintaining a population near its equilibrium.
In general food webs consist of either consumers or producers. - ANS-False
Invasive species are dangerous because - ANS-the native species have not evolved with these
organisms.
Lake trout are a very popular game fish that require deep, cold and high-quality water. The lake
trout grows and matures slowly compared to most other fish but can exhibit logistic growth
under ideal conditions. A region in Utah has an abundant population of native lake trout that
thrive in its lakes. The region decided to adopt sport fishing regulations to maintain the
population because of the importance of the tourism it attracts to the local economy. What would
be the best level to maintain the population of lake trout while allowing sport fishing? - ANS-at
50% its carrying capacity.
Large body size is a characteristic of a K-selected species. - ANS-true
Over the past 12,000 years, the greatest loss of biological wealth has resulted from the -
ANS-conversion of natural ecosystems to modern agriculture.
