Ecology

Front

What is a trophic level?

Back

Each step in a food chain is called a trophic level, representing the flow of energy through an ecosystem.

Front

What percentage of energy is typically transferred from one trophic level to the next?

Back

About 10 percent of energy is transferred from one trophic level to the next.

Front

What is the most important factor influencing the concentration of life in the ocean's top 200 meters?

Back

The amount of sunlight is the most important factor influencing the concentration of life in the ocean's top 200 meters.

Front

What happens to the population of field mice when a new species of snake is introduced?

Back

The population of field mice decreases as they become prey to the introduced snakes.

Front

What is a community in ecological terms?

Back

A community is a group of individuals that belong to the same species and live in the same area.

Front

What is the pyramid of numbers in ecology?

Back

The pyramid of numbers illustrates the number of individuals at each trophic level in an ecosystem.

Front

What is true about producers in an ecosystem?

Back

There are more producers than first-level consumers in a typical ecosystem.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What is a biome?

Back

A biome is a large geographical area characterized by specific climate conditions and distinct plant and animal communities.

Front

What is the role of first-level consumers in a food chain?

Back

First-level consumers, or herbivores, feed on producers and make up the greatest number of individuals in a food chain.