Ecology Levels of Organization and Relationships and Human Impact Invasive Species

Without genetic diversity, a species will most likely...

• grow above its carrying capacity
• go extinct
• become resistant to diseases
• fight off an invasive species

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What is the characteristic shape of a curve illustrating logistic growth?

• A. J-shaped
• B. U-shaped
• C. S-shaped
• D. L-shaped

The picture shows what type of succession?

• primary
• secondary
• tertiary
• quadanary

Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

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A species that is NOT native to a particular region is called

• natural
• invasive
• endemic
• extraordinary

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Exotic or invasive species leads to all of these problems except

• increased biodiversity
• loss of biodiversity
• disease
• loss of native species

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When taken to a new habitat, non-native plants often threaten native plants of the new habitat.  Why do they do this?

• Non-native plants are able to mutate rapidly
• Non-native  plants cause native animals to relocate
• Non-native plants are able to be used for medicine
• Non-native plants compete with native plants for resources

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American alligators used to be an endangered species, but not anymore.  Which of the following is the best reason why there are more in Louisiana today than there were 50 years ago?

• they have learned how to live in new places
• they are bigger now than they were 50 years ago
• they are now protected from hunting by humans
• they have much more habitat now than 50 years ago

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What effect will an invasive species have on the carrying capacity of an ecosystem?

• The carrying capacity will increase
• The carrying capacity for everyone will decrease
• The carrying capacity will only decrease for those in competition for same resource
• The carrying capacity for all animals will stay the same

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Kudzu has overgrown many parts of southern Missouri and native ground plants have disappeared from the area. This is an example of:

• Parasitism between kudzu and the native plants
• A predator prey relationship between ground plants and kudzu
• Competition occurring between the native and invasive species
• Commesalism occurring between the kudzo and native plants

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