Understanding Populations Environmental Science

A hawk building its nest on an arm of a saguaro cactus is an example of 

• commensalism
• mutualism
• parasitism
• predation

The place where an organism lives and that provides the things the organism needs is called its

• habitat
• population
• species
• community

An organism's particular role in its habitat, or how it makes its living, is called its

• carrying capacity
• ecosystem
• competition
• niche

The struggle between organisms to survive in a habitat with limited resources is called

• competition
• predation
• symbiosis
• parasitism

When a jellyfish paralyzes a tiny fish with its poisonous tentacles, the fish is the

• predator
• host
• prey
• parasite

Mutualism, commensalism, and parasitism are the three types of

• symbiotic relationships
• predation
• competition
• prey adaptations

When a flea is living on a dog, the dog is the

• parasite
• host
• predator
• prey

All the different populations that live together in an area make up a(n)

• organism
• community
• species
• ecosystem

The Escherichia coli that live in your intestines and help break down food are an example of which type of interaction?

• competition
• parasitism
• mutualism
• predation

A close relationship between two species that benefits at least one of the species is called

• natural selection
• symbiosis
• adaptation
• competition