Ecology Relationships Review

What is mutualism?

• One organism benefits greatly and the other is not harmed

• One organism benefits while the other is harmed

• Close relationship where both organisms benefit

The type of symbiotic relationship that helps one organism, but does not harm or help the other?

• parasitism

• mutualism

• commensalism

The food web shown is found in a marine ecosystem.  The heron is considered a - 

• producer

• primary consumer

• secondary consumer

• decomposer

a relationship between two in which one species, the predator, feeds on the other species, the prey

• chemosynthesis

• predation

• cellular respiration 

• commensalism

Where an organism lives

• habitat

• niche 

• heterotrogh

• biosphere

Organisms that breaks down and absorbs nutrients from dead organisms 

• consumer

• trophic level

• decomposer

• species

_______ is the study of relationships among living and nonliving parts of an environment. 

• Ecosystem

• Niche

• Habitat

• Ecology

What is a niche?

• the place where a species lives

• what a species eats

• the role of a species

• how a species uses resources

A food web

• shows how energy is released by an organism

• compares the amount of energy at each level

• shows how different food chains in a community are linked together

• is unique since each organism can only be part of one food web

In an energy pyramid, 

• the organisms in each level eat those in the level below them

• the amount of energy increases as you move up each level

• producers are at the top

• the smallest organisms are at the top