Ecological Relationships

Barnacles sometimes live on the outside surface of other larger shelled organisms without causing any harm. What is the ecological relationship?

• Mutualism
• Parasitism
• Commensalism
• Predator-Prey

Cows and pronghorn both eat the same types of food in areas of Utah. What is the ecological relationship?

• Cooperation
• Parasitism
• Commensalism
• Competition

This is known as a relationship in which one organism benefits, while the other is not changed.

• Parasitism
• Mutualism
• Immigration
• Commensalism

A mosquito feeds off of the blood of different organisms. This usually causes discomfort to the organism and sometimes disease and death. This is an example of:

• Parasitism
• Decomposition
• Commensalism
• Mutualism

A relationship between two organisms where one benefits while the other is harmed is known as what?

• Decomposition
• Consummerism
• Mutualism
• Parasitism

Ants protect soft bodied aphids and in return the aphids feed the ants a sugary drink. What is the ecological relationship?

• Cooperation
• Parasitism
• Commensalism
• Mutualism

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

• mutualism
• competition
• predator/prey
• parasitism

A bird builds a nest in a tree and the tree is neither helped nor harmed. What is this type of relationship?

• commensalism

• predation

• mutualism

• parasitism

Vines grow on a tree. The vines get light but the tree is not affected. What kind of relationship is this?

• Competition

• Mutualism

• Commensalism

• Parasitism

Which of the following best describes parasitism?

• +/+
• +/-
• +/0
• -/-