symbiosis

An antelope walks through grass, insects become active and are seen eaten by the birds.  This neither harms nor benefits the antelope.  What type of interaction is this?

• commensalism

• mutualism

• herbivory

• competition

 is when one organism kills and eats another organism.

• mutualism

• predation

• herbivory

• parasitism

Humans have bacteria that live in our stomach and intestines.  These bacteria are adapted to survive in this environment and have difficulty surviving elsewhere.  The bacteria help humans digest food.  This is an example of which interaction?

• competition

• parasitism

• mutualism

• herbivory

What term best describes a relationship between two or more organisms that live closely together?

• symbiosis

• competition

• camouflage

• niche

A bee pollinates a flower.  The flower in turn provides the bee with nectar and pollen to bring back to the hive as food.  What best describes this ecological interaction?

• competition

• herbivory

• mutualism

• parasitism

According to the competitive exclusion principle, which of the following is true?

• 1. Predators act as selecting agents.

• 1. No two species can occupy the same niche at the same time.

• 1. No two species can occupy the same habitat at the same time.

• Some species prefer to cooperate rather than compete.

Which correctly describes the term niche?

• when individuals of different species compete for the same resources in an ecosystem

• two species cannot coexist if they need the same resources

• when species divide an area to avoid competition

• the position and role an organism plays in an ecosystem

A zebra grazes (eats) on grass.  What best describes this ecological interaction?

• mutualism

• herbivory

• competition

What effect do predator/prey relationships have on an ecosystem?

• Predation may harm the individual but benefit the population.

• Predators only eat small animals.

• Predators keep getting larger because of all the food they eat.

• 2. Predator/prey relationships are not essential to the stability of an ecosystem.

 Mistletoe extracts water and nutrients from the spruce tree to the tree’s detriment (causing injury).  What type of interaction is this?

• mutualism

• competition

• herbivory

• parasitism