AP Biology Unit 8 Review

Front

What is the main gas in the atmosphere that we breathe?

Back

Nitrogen is the main gas in the atmosphere, making up about 78% of the air we breathe.

Front

How many years did it take the white-footed mouse population to reach its carrying capacity?

Back

It took 5 years for the white-footed mouse population to reach its carrying capacity.

Front

What is a keystone species?

Back

A keystone species is one that has a disproportionately large impact on its ecosystem relative to its abundance, often helping to maintain the structure of the ecological community.

Front

What percent of available energy is generally passed from one trophic level to the next?

Back

Generally, only 10% of the available energy is passed from one trophic level to the next in an ecosystem.

Front

How is energy transferred in a food web?

Back

Energy from the sun is stored in green plants (producers) and transferred to consumers (herbivores and carnivores) through the food web.

Front

What is the role of producers in an ecosystem?

Back

Producers, such as plants, convert sunlight into chemical energy through photosynthesis, forming the base of the food web.

Front

Define trophic levels.

Back

Trophic levels are the hierarchical levels in an ecosystem, comprising producers, primary consumers, secondary consumers, and decomposers.

Front

What is the significance of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the soil, which supports plant growth.

Front

What is an invasive species?

Back

An invasive species is a non-native species that spreads widely in a new habitat, often causing harm to native species and ecosystems.

Front

Explain the concept of carrying capacity.

Back

Carrying capacity is the maximum population size of a species that an environment can sustain indefinitely without degrading the habitat.