Week #3 - Species Interactions Practice

A non-mutual relationship where one species benefits at the expense of its host. (+/-)

• Mutualism

• Commensalism

• Parasitism

• Naturalism

A tapeworm can be found living in the intestine of a cat. This is an example of _____________.

• mutualism

• parasitism

• commensalism

• competition

A frog eats a fly. The frog and fly are demonstrating ________.

• mutualism
• competition
• predator/prey
• parasitism

A relationship between two organisms in which one organism benefits and the other is unharmed and does not benefit from the interaction (+/0)

• Mutualism

• Competition

• Parasitsm

• Commensalism

A relationship between two organisms in which both organisms benefit. (+/+)

• Mutualism

• Competition

• Parasitsm

• Commensalism

Barnacle larvae drift through the ocean until they find a place to settle as adults which is commonly the body of a whale. The whale is not bothered by the barnacle. This is an example of ________________________.

• Mutualism

• Parasitism

• Commensalism

When a snail dies, its shell is left empty and hermit crabs move in and use the shell as their new home. This is an example of _________________.

• commensalism

• mutualism

• parasitism

• predation

The crocodile and bird have a _______________ relationship. The crocodile benefits by having its teeth cleaned. The bird benefits by gaining food and protection. Both animals benefit from this relationship.

• parasitism

• predator and prey

• mutualism

• commensalism

any interaction between two different organisms living in a close association where there are benefits/harm to one or both of the organisms

• mutualism

• commensalism

• symbiosis

• parasitism

No two species can occupy the same niche

• Competitive Exclusion Principle 
• Limiting Exclusion Theory
• Competitive Limiting Principle
• Limiting Competitive Theory