Unit 8 Ecology

Type of symbiosis: Skunks often live in burrows that have been dug and abandoned by woodchucks.

• commensalism

• mutualism

• parasitism

• predation

A human & a Tape Worm: The tape worm gets a place to live in the intestines of the human and food from the human. The human loses weight and nutrients from the tape worm.

• Mutualism
• Commensalism
• Parasitism

Starfish are probably the most important predator in the shallow ecosystem because they eat basically anything that they can come across. Their feeding activities control the whole ecosystem. This is an example of the starfish ___.

• habitat
• biotic factors
• tolerance level
• niche

A relationship in which two species live closely together.

• resource
• mutualism
• succession
• symbiosis

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

• community.
• ecosystem.
• organism.
• species.

Several species of warblers can live in the same spruce tree ONLY because they

• have different habitats within the tree.
• don’t eat food from the tree.
• occupy different niches within the tree.
• can find different temperatures within the tree.

When two species of cattails are grown together, they grow at different water depths and coexist.  When grown alone, they grow at similar water depths.  Which of the following is best demonstrated by the data?

• natural selection
• character displacement
• resource partitioning
• ecological succession

Succession that occurs after a fire in an ecosystem is called __________________________.

• primary successin
• flame succession
• secondary succession
• climax succession

In ecology, succession refers to:

• balance of power
• survival of the fittest
• natural selection
• gradual development or regrowth of an environment

___ states that two species cannot exist together if they compete for the same resources. One will either die out or migrate, or they will adapt to separate resources.

• Hardy-Weinberg Principle
• Limiting Nutrient Principle
• Competitive Exclusion Principle
• Tolerance Principle