Ecosystem Stability & Change

Multiple Choice

Which of the following factors is most crucial for maintaining ecosystem stability?

• Biodiversity

• Amount of sunlight

• Presence of a single species

• Human intervention

Multiple Select

Which of the following are considered natural causes of environmental change?

• Overhunting

• Fires

• Floods

• Pollution

Multiple Choice

Which of the following is an example of a human-caused environmental change?

• Floods

• Volcanic eruptions

• Pollution

• Migration

Multiple Choice

After a volcanic eruption, volcanic rock is present (but no soil). Which of the following states the most likely order of succession that would be seen?

• Lichens → Shrubs → Grasses → Trees

• Lichens → tree → shrubs→Grasses

• Grasses → Lichens → Shrubs → Trees

• Lichens → Grasses → Shrubs → Trees

Multiple Choice

Natural disasters such as flooding,forest fires, and tornadoes are associated with which type of succession?

• primary

• secondary

• Gordito

• ecosystem

Multiple Choice

Why does primary succession typically occur over a longer period of time (as compared to secondary succession)?

• Because trees do not perform respiration

• Because the climax community is usually a forest.

• Because primary succession already has soil

• Because primary succession does not begin with soil being present

Multiple Choice

What is an example of an area that is likely to undergo primary succession?

• Glaciers melt and leave exposed rock

• Plants die from drought and decompose

• Land is bulldozed and soil remains

• A forest fire occurs

Multiple Choice

An increase in biodiversity or a progression over time -after a natural or man made disturbance - is called what?

• ecological recession

• climax recession

• ecological succession

• climax succession

Multiple Select

Which human activities listed contribute to habitat destruction and fragmentation?

• Agriculture

• Road construction

• Fishing

• Urban development

Multiple Choice

Which of the following is NOT a result of habitat destruction and fragmentation?

• Loss of food and shelter

• Isolated populations

• Reduced biodiversity

• Increase in biodiversity

Multiple Choice

What is an invasive species?

• An organism that is new to an environment that has positive effects on the environment.

• An organism that is native to an environment that has negative effects on the environment.

• An organism that is new to an environment that has negative effects on the environment.

• An organism that is native to an environment that has positive effects on the environment.

Multiple Choice

Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.

Multiple Choice

Invasive species alter the ecosystem by a___________in number quickly,this leads to _____ food for the native  species. 

• increasing  less
• decline  decreasing

Multiple Choice

What does conserving resources mean?

• Use as much of the resources as you can
• Only use the resources at school
• Protecting the resource so it does not run out

Multiple Choice

Eutrophication is caused by

• excess nutrients building up in the water.

• industrial point-source pollution.

• unlined landfills and septic tanks.

• wastewater from homes mixing with drinking water.

Multiple Choice

How does eutrophication cause the death of aquatic organisms

• the build up of carbon dioxide in the water

• the lack of nitrogen in the water

• the lack of carbon dioxide in the water

• the lack of oxygen in the water

Multiple Choice

What could be a direct consequence of removing a top predator from an ecosystem?

• A decrease in the population of primary consumers.

• An increase in the diversity of plant species.

• A decrease in the overall biodiversity of the ecosystem.

• An increase in the population of herbivores, leading to overgrazing.

Multiple Choice

Which of the following is NOT a condition that affects an organism's tolerance range?

• Temperature

• pH

• Water

• Sunlight

Multiple Choice

when the plant respond to touch this is an example of

• phototropism

• Thigmotropsim

• hydrotropism

• geotropism

Multiple Choice

Traits or characteristics of an organism that help it survive in a changing environment.

• adaptations

• habitats

• ecosystems

Multiple Choice

This plant is growing its roots towards water, this is an example o

• thigmotropism

• gravito tropism

• Hydrotropism

• phtotropism

Multiple Choice

Why do desert plants have large, waxy stems?

• store water and prevent water loss

• warmth

• protection

Multiple Choice

plant growing towards sun light shows

• thigmotropsim

• phototropism

• hydrotropism

• geotropism

Multiple Choice

What is NOT a physical adaptation?

• A turtle having a hard thick shell.

• Herons having long legs to wade in the water.

• A bird having a sharp beak to help them catch their prey.

• Baby Cheetahs learning to hunt from their mom.

Multiple Choice

Which of the following is most likely to help an ecosystem recover from minor disturbances?

• High biodiversity

• Low biodiversity

• Stable climate

• Human intervention

Multiple Choice

How do biodiversity and stability work together?

• The lower the biodiversity the greater the stability of an ecosystem.

• The higher the biodiversity, the less stable the ecosystem

• The higher the biodiversity, the greater the stability of the ecosystem.

• Biodiversity has nothing to do with ecosystem stability.