DCA 3 Ecosystems Class Review

Front

What is competition in ecosystems?

Back

A relationship that occurs when two or more organisms of the same species need the same resource at the same time.

Front

What is a limiting factor?

Back

A condition that restricts the growth, abundance, or distribution of an organism or a population of organisms.

Front

Which of the following is NOT a limiting factor: Climate, Available Food & Water, Available Space & Shelter, Species color?

Back

Species color is NOT a limiting factor.

Front

What happens to predator and prey populations over time?

Back

Predator population lags behind prey population because an increase in predators leads to a decrease in prey.

Front

What are decomposers?

Back

Organisms, like bacteria, insects, and worms, that break down waste and recycle nutrients back into the ecosystem.

Front

What effect does an increase in the wolf population have on the deer population?

Back

An increase in the wolf population can lead to a decrease in the deer population.

Front

Define symbiosis.

Back

A close and long-term interaction between two different species, which can be beneficial, neutral, or harmful.

Front

What is predation?

Back

An interaction where one organism (the predator) kills and eats another organism (the prey).

Front

Give an example of a biotic factor in an ecosystem.

Back

Plants, animals, bacteria, and fungi are all examples of biotic factors.

Front

Give an example of an abiotic factor in an ecosystem.

Back

Sunlight, temperature, water, and soil are examples of abiotic factors.