DCA 3 Ecosystems Class Review

Front

What is competition in ecosystems?

Back

Competition occurs when two or more species or individuals vie for the same resources, such as food, space, or light, leading to a struggle for survival.

Front

What is parasitism?

Back

Parasitism is a symbiotic relationship where one organism benefits at the expense of another, harming the host organism.

Front

What happens to energy as you move up an energy pyramid?

Back

As you move up trophic levels on an energy pyramid, the amount of available energy decreases due to energy loss at each level.

Front

What occurs when the death rate exceeds the birth rate in a population?

Back

When the death rate is higher than the birth rate, the population size decreases.

Front

What factors can increase a population size?

Back

Factors that can increase population size include a high birth rate and immigration.

Front

Define mutualism in ecosystems.

Back

Mutualism is a symbiotic relationship where both organisms benefit from the interaction.

Front

What is commensalism?

Back

Commensalism is a type of symbiotic relationship where one organism benefits while the other is neither helped nor harmed.

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 a trophic level.

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients from producers to various levels of consumers.

Front

What is the role of producers in an ecosystem?

Back

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