FINAL APES Review

Front

What is an independent variable in an experiment?

Back

The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

Define a keystone species.

Back

A keystone species is an organism that has a disproportionately large effect on its environment relative to its abundance, influencing the survival of many other species in its ecosystem.

Front

How does climate change affect the distribution of species like Red Pine trees?

Back

Climate change can cause species like Red Pine to shift their distribution northward into cooler areas, such as Canada, as their current habitats become unsuitable.

Front

What pollutants do catalytic converters reduce from car exhaust?

Back

Catalytic converters reduce carbon monoxide and hydrocarbons from car exhaust.

Front

What is emigration in population dynamics?

Back

Emigration is the process by which individuals leave a population, leading to a decrease in population size.

Front

What is the role of a control group in an experiment?

Back

A control group is used as a benchmark to measure how the other tested subjects do, ensuring that the results are due to the independent variable.

Front

Explain the concept of limiting factors in ecology.

Back

Limiting factors are environmental conditions that restrict the growth, abundance, or distribution of an organism or a population of organisms.

Front

What is the difference between immigration and emigration?

Back

Immigration refers to individuals moving into a population, while emigration refers to individuals moving out of a population.

Front

What is the significance of biodiversity in an ecosystem?

Back

Biodiversity contributes to ecosystem resilience, productivity, and stability, allowing ecosystems to adapt to changes and disturbances.

Front

Define the term 'habitat'.

Back

A habitat is the natural environment in which a species or community of species lives, including all living and non-living factors.