APES semester 1 practice

Front

What is a keystone species?

Back

A species that has a disproportionately large effect on its environment relative to its abundance, often crucial for the survival of many other species.

Front

Why are keystone species important?

Back

Many other species depend on them for survival.

Front

What is the most abundant gas in the atmosphere?

Back

Nitrogen.

Front

What is an abiotic factor?

Back

A non-living component of an ecosystem, such as sunlight, water, and temperature.

Front

Which of the following is not an abiotic factor?

Back

Bacteria.

Front

What is biodiversity?

Back

The variety of life in a particular habitat or ecosystem.

Front

How does higher biodiversity affect ecosystem resilience?

Back

Higher biodiversity leads to higher ecosystem resilience.

Front

What is a trophic level?

Back

A level in a food chain or food web, representing the flow of energy and nutrients.

Front

Which trophic level has the most biomass?

Back

Producers.

Front

What are producers in an ecosystem?

Back

Organisms that produce their own food through photosynthesis or chemosynthesis, forming the base of the food chain.