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. 
• A keystone species in an environment
• none of the above

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What is a NON-NATIVE species?

• a plant or animal that is in its right place

• a plant or animal that has been moved to a new place where it doesn't belong

• a kind of plant that no animals eat

• a kind of plant or animal that doesn't live anywhere

If a new, NON-NATIVE species that eats rabbits was introduced into this food chain, what would probably happen?

• the population of rabbits would increase

• the population of eagles would increase

• the population of eagles would decrease

• there would be less sunlight

Answer explanation

If a new animal started eating the rabbits, there would be less rabbits.

Also, the eagle eats rabbits, too, so there would less food for the eagle, and there would be less eagles, too.

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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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If a blue catfish is introduced and eats the large fish who eat the smaller fish, what will happen to the population of the smaller fish?

• Increase
• Decrease
• Stay the same
• No affect on smaller fish

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Which of the following is a key characteristic of most invasive species?

• Ability to breathe in the air & in the water
• Large, sharp teeth
• Produce many offspring
• Is a top predator