Invasive Species Tcap

What is an invasive species?

• A native (naturally found) species which are added to an area.

• A non-native (not naturally found) species added to an area that causes harm to the ecosystem.

• A keystone species in an environment

• none of the above

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Invasive species alter the ecosystem by ___________in number quickly. This leads to _____ food for the native species.

• increasing less

• decline decreasing

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Invasive species grow quickly due to the lack of predators, this leads to a decline or extinction of the native population. True or false? 

• false
• true

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This invasive species came over in boats from Europe in the 1980's.  They harm native fish, clog pipes and ruin beaches.  

• Sea Lamprey
• Zebra Mussel
• Asian Carp
• Feral Swine

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Why do the populations of invasive species grow so quickly? 

• Invasive Species are native to an area. 
• Invasive species are prey to many animals.
• Invasive species have no predators.
• Invasive species keep the ecosystems in equilibrium.

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The primary cause of invasive species introduction is

• too much food

• human actions

• weather events

• asteroids

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Invasive species cost

• Hundreds of billions of dollars each year

• hundreds of dollars each year

• thousands of dollars each year

• hundreds of millions each year

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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The field mouse population in Australia has grown so fast that they eat an average of  $4 billion of wheat every year. Their fast growth is caused by:

• A. The mice like to reproduce
• B. A lack of a native species to eat the field mouse
• C. Abundant food supply
• Both B and C

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1. What makes a species invasive?

• Moving to a new ecosystem and taking resources from natives

• Coming from another place

• Not being able to adapt quickly

• Taking up large amounts of space

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