Gr8 Unit 8 Mid-Unit Assessment

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Ensure all tabs on your Chromebook are closed before beginning your assessment.
You will be given 50 minutes to complete your Unit 8 Mid-Unit Assessment.
Please read all questions carefully and make sure to check your work before submitting.

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1

The carrying capacity of an environment may be decreased by:

maintaining biodiversity

replacing lost minerals

removing dead organisms

preventing deforestation

LE.S4.KI6.1d

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A decrease in the biodiversity of an ecosystem usually leads to:

an increase in predator and prey populations

the elimination of material cycling

a decrease in stability

an increase in dynamic equilibrium

LE.S4.KI6.2a

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Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?

food

mates

predators

prey

LE.S4.KI1.1d

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Which human activity has the potential to greatly affect the equilibrium of an ecosystem?

cutting down a few small evergreen trees and using them to make holiday decorations

mowing the playing fi elds in a city park

washing a car with a detergent-based cleaner

emptying an aquarium containing many nonnative fish of several species into a local lake

LE.S4.KI7.1c

Base your answers to questions 5 and 6 on the diagram at the left and on your knowledge of biology.

The diagram represents interactions between organisms in an ecosystem.

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1

Which statement correctly identifies a possible role of one organism in this ecosystem?

Species A may carry out autotrophic nutrition.

Species B may be a producer that synthesizes nutrients.

Species C carries out heterotrophic nutrition.

Species D can recycle energy from the Sun.

LE.S4.KI1.1a

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LE.S4.KI1.1d

Base your answers to question 7 on the information below and on your knowledge of biology.

The Venus flytrap is a plant that uses specialized leaves in order to capture and digest small insects.

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Although the Venus flytrap uses its prey to obtain certain molecules that it needs, it is still classified as a producer because it:

uses its prey to produce food

consumes the prey to produce energy

synthesizes energy by using oxygen and releasing carbon dioxide

synthesizes glucose by using carbon dioxide and water

LE.S4.KI1.1a

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Which factor would be an abiotic limiting factor for fish living in a lake in New York State?

amount of algae

number of humans fishing

number of fish predators

acidity of the water

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1

A native species is competing for resources with a nonnative species that was accidentally introduced into the area. The nonnative species is more likely to survive than the native species when:

both species eat the same food

predators prey on both species

the native species is immune to a particular pathogen present in the ecosystem

the nonnative species has no natural enemies present in the ecosystem

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1

Hydrilla, a plant native to Central Africa, was widely used in home aquaria. Hydrilla was often dumped with aquarium water into drains, sewers, or ponds. It then thrived and has become an invasive species, disrupting aquatic ecosystems from Florida through the northeast United States. Removing Hydrilla from these ecosystems will most likely require either physically removing it or adding chemicals to the affected waters to kill it.
The result of the introduction of Hydrilla into native ecosystems in the United States has shown that:

chemical controls will now be necessary to maintain every stable ecosystem

Hydrilla will not continue to expand beyond one year because it is not native to the United States

organisms in ecosystems of the United States can eventually build up an immunity to Hydrilla

when humans alter ecosystems by adding specific organisms, serious consequences can result

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1

Which organism in the food web would contain the highest concentration of chemical pollutants?

producers

primary consumers

secondary consumer

tertiary consumer

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1

Which of the following statements is most closely related to the modern theory of evolution?

Asexual reproduction increases the survival of species.

Organisms best adapted to a changed environment are more likely to reproduce and pass their genes to offspring.

Characteristics that are acquired during life are passed to offspring by sexual reproduction.

Evolution is the result of mutations and recombination, only.

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The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.
What concept is represented in the diagram?

survival of the fittest

succession

dynamic equilibrium

extinction

1

What would most likely happen if most of the bacteria and fungi were removed from an ecosystem?

Questions 15 through 16 refer to the following:

In recent years, the striped bass population in Chesapeake Bay has been decreasing. This is due, in part, to events known as "fish kills," a large die-off of fish. Fish kills occur when oxygen-consuming processes in the aquatic ecosystem require more oxygen than the plants in the ecosystem produce, thereby reducing the amount of dissolved oxygen available to the fish. One proposed explanation for the increased fish kills in recent years is that human activities have increased the amount of sediment suspended in the water of Chesapeake Bay, largely due to increased erosion into its tributary streams. The sediment acts as a filter for sunlight, which causes a decrease in the intensity of the sunlight that reaches the aquatic plants in the Chesapeake Bay ecosystem.

1

Identify one abiotic factor in the Chesapeake Bay ecosystem involved in the fish kills described in the reading passage.

1

Identify one farming practice that could be a source of environmental pollution.

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A food web is represented below
Which statement best describes the energy in this food web?

The energy content of level C is greater than the energy content of level A.

The energy content of level B depends on the energy content of level C.

The energy content of level B is transferred to level A.

The energy content of level A depends on energy provided from an abiotic source.

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One important reason that humans have such a significant effect on Earth’s ecosystems is that humans

remove large amounts of carbon dioxide from the air

are able to increase the amount of finite resources

can modify the environment through technology

reproduce faster than other animal species

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Base your answer to question 19 on the information below and on your knowledge of biology.
Desert camels have:
• large feet
• nostrils that can be closed
• fat stored in their humps
• a body temperature between 33.9°C and 41.7°C
• thick lips
• brown coat color
• hair-lined ears
Which statement best describes these camel characteristics?

Natural selection favored other characteristics over the ones listed

The listed characteristics are the result of manipulating genes in female camels.

These characteristics have adaptive value for the camel.

Camels have these characteristics because they needed them.

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The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).
One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer

resources available

decomposers adding nutrients to the soil

white-tail deer predators present

white-tail deer born

Gr8 Unit 8 Mid-Unit Assessment

The carrying capacity of an environment may be decreased by:

A decrease in the biodiversity of an ecosystem usually leads to:

Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?

Which human activity has the potential to greatly affect the equilibrium of an ecosystem?

Which statement correctly identifies a possible role of one organism in this ecosystem?

Although the Venus flytrap uses its prey to obtain certain molecules that it needs, it is still classified as a producer because it:

Which factor would be an abiotic limiting factor for fish living in a lake in New York State?

A native species is competing for resources with a nonnative species that was accidentally introduced into the area. The nonnative species is more likely to survive than the native species when:

Which organism in the food web would contain the highest concentration of chemical pollutants?

Which of the following statements is most closely related to the modern theory of evolution?

The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.
What concept is represented in the diagram?

What would most likely happen if most of the bacteria and fungi were removed from an ecosystem?

Identify one abiotic factor in the Chesapeake Bay ecosystem involved in the fish kills described in the reading passage.

Identify one farming practice that could be a source of environmental pollution.

A food web is represented below
Which statement best describes the energy in this food web?

One important reason that humans have such a significant effect on Earth’s ecosystems is that humans

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).
One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer

The carrying capacity of an environment may be decreased by:

A decrease in the biodiversity of an ecosystem usually leads to:

Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?

Which human activity has the potential to greatly affect the equilibrium of an ecosystem?

Which statement correctly identifies a possible role of one organism in this ecosystem?

Which statement correctly describes an interaction that contributes to the stability of this ecosystem?

Although the Venus flytrap uses its prey to obtain certain molecules that it needs, it is still classified as a producer because it:

Which factor would be an abiotic limiting factor for fish living in a lake in New York State?

A native species is competing for resources with a nonnative species that was accidentally introduced into the area. The nonnative species is more likely to survive than the native species when:

Which organism in the food web would contain the highest concentration of chemical pollutants?

Which of the following statements is most closely related to the modern theory of evolution?

The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.
What concept is represented in the diagram?

What would most likely happen if most of the bacteria and fungi were removed from an ecosystem?

Identify one abiotic factor in the Chesapeake Bay ecosystem involved in the fish kills described in the reading passage.

Identify one farming practice that could be a source of environmental pollution.

A food web is represented below
Which statement best describes the energy in this food web?

One important reason that humans have such a significant effect on Earth’s ecosystems is that humans

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).
One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer

Which statement correctly describes an interaction that contributes to the stability of this ecosystem?

Gr8 Unit 8 Mid-Unit Assessment

Gr8 Unit 8 Mid-Unit Assessment

The carrying capacity of an environment may be decreased by:

A decrease in the biodiversity of an ecosystem usually leads to:

Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?

Which human activity has the potential to greatly affect the equilibrium of an ecosystem?

Which statement correctly identifies a possible role of one organism in this ecosystem?

Although the Venus flytrap uses its prey to obtain certain molecules that it needs, it is still classified as a producer because it:

Which factor would be an abiotic limiting factor for fish living in a lake in New York State?

A native species is competing for resources with a nonnative species that was accidentally introduced into the area. The nonnative species is more likely to survive than the native species when:

Which organism in the food web would contain the highest concentration of chemical pollutants?

Which of the following statements is most closely related to the modern theory of evolution?

The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.What concept is represented in the diagram?

What would most likely happen if most of the bacteria and fungi were removed from an ecosystem?

Identify one abiotic factor in the Chesapeake Bay ecosystem involved in the fish kills described in the reading passage.

Identify one farming practice that could be a source of environmental pollution.

A food web is represented belowWhich statement best describes the energy in this food web?

One important reason that humans have such a significant effect on Earth’s ecosystems is that humans

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer

The carrying capacity of an environment may be decreased by:

A decrease in the biodiversity of an ecosystem usually leads to:

Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?

Which human activity has the potential to greatly affect the equilibrium of an ecosystem?

Which statement correctly identifies a possible role of one organism in this ecosystem?

Which statement correctly describes an interaction that contributes to the stability of this ecosystem?

Although the Venus flytrap uses its prey to obtain certain molecules that it needs, it is still classified as a producer because it:

Which factor would be an abiotic limiting factor for fish living in a lake in New York State?

A native species is competing for resources with a nonnative species that was accidentally introduced into the area. The nonnative species is more likely to survive than the native species when:

Which organism in the food web would contain the highest concentration of chemical pollutants?

Which of the following statements is most closely related to the modern theory of evolution?

The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.What concept is represented in the diagram?

What would most likely happen if most of the bacteria and fungi were removed from an ecosystem?

Identify one abiotic factor in the Chesapeake Bay ecosystem involved in the fish kills described in the reading passage.

Identify one farming practice that could be a source of environmental pollution.

A food web is represented belowWhich statement best describes the energy in this food web?

One important reason that humans have such a significant effect on Earth’s ecosystems is that humans

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer

Which statement correctly describes an interaction that contributes to the stability of this ecosystem?

The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.
What concept is represented in the diagram?

A food web is represented below
Which statement best describes the energy in this food web?

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).
One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer

The diagram below shows the effect of spraying a pesticide on a population of insects over three generations.
What concept is represented in the diagram?

A food web is represented below
Which statement best describes the energy in this food web?

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).
One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer