Ch 7 - Biodiversity

A solution to habitat fragmentation is

• building ecosystem ladders

• building more zoos

• building more islands

• building wildlife corridors

What are the three main components of Biodiversity? (Select all that apply)

• Endangered

• Species

• Genetic

• High Risk

• Ecosystem

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

What does biodiversity mean?

• Only one species in an area.
• The different amount of species in an area
• All abiotic life
• Nitrogen fixation

1. What makes a species invasive?

• Moving to a new ecosystem and taking resources from natives 
• Not having papers
• Species that can't adapt
• Plants that take up too much space

An endangered species is

• One whose numbers are so small that it is at risk of extinction
  

• One whose not been spotted after many years.

• One whose numbers are abundant.

The primary causes of extinction (and endangerment and threatened status) are...

• polar ice cap melting

• global warming

• habitat loss and degradation

• burning of fossil fuels

How does habitat fragmentation reduce genetic diversity in species?

• Habitat fragmentation makes nonnative species introduction possible.

• Habitat fragmentation opens migration routes.

• Habitat fragmentation isolates a large population into smaller groups.

• Habitat fragmentation encourages open gene flow.

The number of different species and the abundance of each species in a biological community.

• genetic diversity
• ecosystem diversity
• extinction
• species diversity

What is the variety of genes present?

• biodiversity

• species diversity

• extinction

• genetic diversity