{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

1

The Hoover Dam was built in 1936, blocking the Colorado River, one of the largest rivers in the USA. The dam was made to create energy and to control floods, but there were many unintended consequences on the environment.
Which of the following is a negative impact of the Hoover Dam on the ecosystem?

The environment will become more stable as there will be less floods.

The environment will become more stable, as the fish will have to stay on their side of the dam

The environment will become less stable, as the fishes habitat is affected

The environment will become more stable as humans will receive electricity

1

Overharvesting of shrimp in the Gulf of Mexico has led to a significant decline in shrimp populations because they are caught faster than they can reproduce. Shrimp serve as a food source for many fish, birds, and marine mammals in the region.
Which statement describes the most likely effect that shrimp overharvesting will have on this ecosystem?

Overharvesting makes the ecosystem more stable by encouraging predators to switch to other food sources.

Overharvesting decreases the stability of the ecosystem by reducing food availability for many species.

Overharvesting has no effect on ecosystem stability because shrimp reproduce quickly.

Overharvesting increases ecosystem stability by reducing competition among shrimp.

1

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

The ecosystem would become more stable because increased water availability would promote plant growth.

The ecosystem would become less stable because primary producers would be lost, reducing food availability.

The ecosystem would become more stable because decomposers would break down excess organic material

The ecosystem would become less stable because predator populations would increase due to greater hunting opportunities.

This question has two parts.

A coastal marsh in Texas supports a wide variety of shorebird species. Each species feeds on different prey, nests in different areas of the marsh, and migrates at slightly different times of the year. Because the birds use different resources, competition between them is reduced.

1

Part A
How does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

By reducing the ability of individual organisms to adapt to changing conditions

By making the ecosystem more vulnerable to population losses

By increasing the ecosystems' ability to stay healthy when conditions change

By making individual organisms less vulnerable to competition from invasive species

1

A population of an invasive predatory snake species is rapidly increasing on a tropical island. The snake feeds on native birds, lizards, and small mammals. Because the native species did not evolve with this predator, several bird species become extinct within a few decades.
Which statement BEST describes the effect of a native species’ extinction on local ecosystem biodiversity and stability?

Extinction increases biodiversity by allowing invasive species to fill empty niches

Extinction only affects the extinct species and has little impact on the ecosystem

Ecosystem stability improves when fewer species are present

Extinction decreases biodiversity, disrupting food webs and making the ecosystem less stable

Ɛhia

1

The Houston toad (Anaxyrus houstonensis) is a rare amphibian native to sandy soils and pine forests in central Texas. It relies on seasonal pools of water for breeding and is highly sensitive to changes in its habitat.
Which human activity would most likely decrease the ability of the Houston toad to survive?

Expanding urban development that destroys sandy soil habitats and breeding ponds.

Restoration efforts that increase vegetation in areas where the toad lives.

Habitat protection programs that create reserves for threatened species.

Removal of an invasive predator that preys on Houston toads.

Ɛhia

1

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

The ecosystem would become less stable because primary producers would be lost, reducing food availability.

The ecosystem would become more stable because increased water availability would promote plant growth.

The ecosystem would become more stable because decomposers would break down excess organic material.

The ecosystem would become less stable because predator populations would increase due to greater hunting opportunities.

Ɛhia

1

Overharvesting of shrimp in the Gulf of Mexico has led to a significant decline in shrimp populations because they are caught faster than they can reproduce. Shrimp serve as a food source for many fish, birds, and marine mammals in the region.
Which statement describes the most likely effect that shrimp overharvesting will have on this ecosystem?

Overharvesting makes the ecosystem more stable by encouraging predators to switch to other food sources.

Overharvesting increases ecosystem stability by reducing competition among shrimp.

Overharvesting decreases the stability of the ecosystem by reducing food availability for many species.

Overharvesting has no effect on ecosystem stability because shrimp reproduce quickly.

Ɛhia

1

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.
Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

The population of sharks would increase causing the small reef fish population to decrease.

The populations of small reef fish would decrease, leading to an increase in algae due to fewer herbivores.

The population of small reef fish would increase causing the large reef fish population to decrease.

The population of large reef fish would increase due to an increase in food availability.

Ɛhia

1

In a desert ecosystem, an extended heat wave causes many flowering plants to die. As a result, pollinators such as bees and butterflies decline, followed by a decrease in small reptiles and birds that feed on insects.

Biodiversity would increase because fewer plants compete for water

The ecosystem would remain stable because deserts naturally have fewer species

The loss of plants would only affect pollinators

Biodiversity would decrease, leading to reduced ecosystem stability

Ɛhia

1

Mangrove forests are coastal ecosystems that provide habitat for shrimp, crabs, small fish, birds, and juvenile reef fish. Large predatory fish help control populations of smaller fish that feed on algae. In recent years, overfishing has greatly reduced the number of large predatory fish in mangrove areas.
Which consequence is MOST likely to occur in the mangrove ecosystem as a result of the decrease in large predatory fish?

Algae populations will decrease, increasing biodiversity

The ecosystem will become more stable because there are fewer predators

Smaller fish populations may increase, disrupting the balance of the food web

Biodiversity will increase because competition is reduced

Ɛhia

1

The desert tortoise, Gopherus agassizii, is a slow-moving reptile that lives in burrows in desert ecosystems of the southwestern United States. It depends on native grasses and shrubs for food and shelter.
Which human activity would MOST likely decrease the ability of the desert tortoise to survive?

Increasing urban development that destroys native desert vegetation and burrowing areas

Restoring native plant species to improve food availability for the native organisms

Establishing protected wildlife areas that limit habitat disturbance thus increasing biodiversity

Reducing off-road vehicle use in desert habitats to protect the lives of organisms in habitats

Copy of Friday (03/27) - Threats to Biodiversity Practice & Exit Ticket (5/2/2026)

Copy of Friday (03/27) - Threats to Biodiversity Practice & Exit Ticket (5/2/2026)

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

This question has two parts.

A coastal marsh in Texas supports a wide variety of shorebird species. Each species feeds on different prey, nests in different areas of the marsh, and migrates at slightly different times of the year. Because the birds use different resources, competition between them is reduced.

Part A
How does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.
Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

In a desert ecosystem, an extended heat wave causes many flowering plants to die. As a result, pollinators such as bees and butterflies decline, followed by a decrease in small reptiles and birds that feed on insects.

The desert tortoise, Gopherus agassizii, is a slow-moving reptile that lives in burrows in desert ecosystems of the southwestern United States. It depends on native grasses and shrubs for food and shelter.
Which human activity would MOST likely decrease the ability of the desert tortoise to survive?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

This question has two parts.

A coastal marsh in Texas supports a wide variety of shorebird species. Each species feeds on different prey, nests in different areas of the marsh, and migrates at slightly different times of the year. Because the birds use different resources, competition between them is reduced.

Part A
How does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

Part B
Which statement BEST supports the answer in Part A?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.
Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

In a desert ecosystem, an extended heat wave causes many flowering plants to die. As a result, pollinators such as bees and butterflies decline, followed by a decrease in small reptiles and birds that feed on insects.

The desert tortoise, Gopherus agassizii, is a slow-moving reptile that lives in burrows in desert ecosystems of the southwestern United States. It depends on native grasses and shrubs for food and shelter.
Which human activity would MOST likely decrease the ability of the desert tortoise to survive?

Part B
Which statement BEST supports the answer in Part A?

Copy of Friday (03/27) - Threats to Biodiversity Practice & Exit Ticket (5/2/2026)

Copy of Friday (03/27) - Threats to Biodiversity Practice & Exit Ticket (5/2/2026)

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.Which description best explains how this would affect the ecosystem in that area?

This question has two parts.

A coastal marsh in Texas supports a wide variety of shorebird species. Each species feeds on different prey, nests in different areas of the marsh, and migrates at slightly different times of the year. Because the birds use different resources, competition between them is reduced.

Part AHow does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.Which description best explains how this would affect the ecosystem in that area?

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

In a desert ecosystem, an extended heat wave causes many flowering plants to die. As a result, pollinators such as bees and butterflies decline, followed by a decrease in small reptiles and birds that feed on insects.

The desert tortoise, Gopherus agassizii, is a slow-moving reptile that lives in burrows in desert ecosystems of the southwestern United States. It depends on native grasses and shrubs for food and shelter.Which human activity would MOST likely decrease the ability of the desert tortoise to survive?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.Which description best explains how this would affect the ecosystem in that area?

This question has two parts.

A coastal marsh in Texas supports a wide variety of shorebird species. Each species feeds on different prey, nests in different areas of the marsh, and migrates at slightly different times of the year. Because the birds use different resources, competition between them is reduced.

Part AHow does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

Part BWhich statement BEST supports the answer in Part A?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.Which description best explains how this would affect the ecosystem in that area?

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

In a desert ecosystem, an extended heat wave causes many flowering plants to die. As a result, pollinators such as bees and butterflies decline, followed by a decrease in small reptiles and birds that feed on insects.

The desert tortoise, Gopherus agassizii, is a slow-moving reptile that lives in burrows in desert ecosystems of the southwestern United States. It depends on native grasses and shrubs for food and shelter.Which human activity would MOST likely decrease the ability of the desert tortoise to survive?

Part BWhich statement BEST supports the answer in Part A?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

Part A
How does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.
Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

Part A
How does the biodiversity of shorebird species MOST LIKELY affect the stability of the ecosystem?

Part B
Which statement BEST supports the answer in Part A?

A severe flood occurs in a grassland ecosystem, submerging the soil and washing away many plants.
Which description best explains how this would affect the ecosystem in that area?

The invasive lionfish, a predator with no natural enemies in the Atlantic Ocean, has rapidly spread across coral reef ecosystems, where it consumes large amounts of the reef fish population.
Based on the food web, how would an increase in the lionfish population most likely affect this ecosystem?

Part B
Which statement BEST supports the answer in Part A?