Unit 5 Review

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

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

• increasing, less

• increasing, more

• decreasing, less

• decreasing, more

TRUE or FALSE? Invasive species grow quickly due to the lack of predators. This leads to a decline or extinction of the native population.

• True

• False

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

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.

The place where an organism lives in order to obtain its food, water, shelter and other things needed for survival is called a ---

• Niche.

• Habitat.

• Home.

• Ecosystem.

A species indigenous to a certain region or ecosystem naturally is a ---

• Native Species.

• Accidental Species.

• Introduced Species.

• Invasive Species.

TRUE or FALSE? Invasive species can be introduced to an ecosystem accidentally.

• True

• False

Invasive species can cause or lead to the --- [choose 2]

• increase of native plants and animals.

• habitats to be permanently altered.

• decrease of invasive plants and animals.

• extinction of native plants and animals.

Invasive plants out-compete native plants for --- [choose 3]

• sunlight.

• water.

• oxygen.

• space.