Final Practice Questions

In an aquatic ecosystem, producers are typically:

How does nitrogen fixation support plant growth?

A species of fish is introduced to a local pond to control algae. The native fish population decreases. Why?

Why do producers have the most available energy in an ecosystem?

In a sealed ecosystem, an increase in photosynthetic plants results in decline in carbon dioxide levels. Which equation?

What will most likely happen if deforestation continues at a global scale?

In a desert ecosystem, how does water availability act as a limiting factor for populations?

In which situation would transfer energy between trophic levels be most efficient?

A population of deer thrives in a forest until drought significantly reduces available water. This is an example of:

A student observes a plant wilting after being placed in a hypertonic solution. What is causing the plant to wilt?

After a hurricane destroys a coastal forest, plants such as grasses and shrubs begin growing before trees return.

Why does an increase in atmospheric CO2 levels lead to climate change?

Which situation best shows competition as a limiting factor in a population?

Which of the following scenarios demonstrates the role of decomposers in an ecosystem?

A predator species is removed from an ecosystem. What is most likely going to happen?

After a forest fire, grasses and shrubs grow quickly while trees take years to re-establish. This is an example of:

A freshwater fish is placed in a saltwater tank, what is the most likely effect due to osmosis?

Which of the following situations illustrates a population exceeding its carrying capacity?

In a food chain, which group is least likely to directly affect the energy available at the producer level?

A newly introduced plant species grows rapidly and displaces native plants. This scenario best shows illustrates:

A chemical factor pollutes a nearby river, causing an algal bloom. What is the immediate ecological consequence?

How does cutting down a forest affect the carbon cycle?

If an animal cell is placed in an isotonic solution, what will happen to the cell?

A farmer sees a decline in soil fertility after planting the same crop. What process could restore soil nitrogen levels?