Lesson 3 Interactions Among Living Things

Front

What is a parasite?

Back

A parasite is an organism that lives on or in a host organism and gets its food at the expense of its host.

Front

What is the term for an animal that is hunted by another animal?

Back

The term for an animal that is hunted by another animal is 'prey'.

Front

Define symbiosis.

Back

Symbiosis is a relationship in which two species live closely together, often interacting in ways that benefit one or both.

Front

What is commensalism?

Back

Commensalism is a relationship between two organisms in which one organism benefits and the other is neither helped nor harmed.

Front

What is mutualism?

Back

Mutualism is a relationship between two organisms in which both organisms benefit from the interaction.

Front

Give an example of a parasitic relationship.

Back

An example of a parasitic relationship is a tapeworm living in the intestines of a mammal.

Front

What is the difference between mutualism and commensalism?

Back

In mutualism, both organisms benefit, while in commensalism, one organism benefits and the other is unaffected.

Front

What is an example of symbiosis in nature?

Back

An example of symbiosis is the relationship between clownfish and sea anemones, where clownfish get protection and anemones get nutrients.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic material, returning nutrients to the soil and supporting plant growth.

Front

What is competition in ecological terms?

Back

Competition is the interaction between organisms or species in which both are harmed as they vie for the same resources.