biodiversity

Biodiversity refers to

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

What makes a species invasive?

• Moving to a new ecosystem and taking resources from native species

• Not having prey

• Species that can't adapt
• Plants that take up too much space

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

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

Invasive species have a negative impact on...

• the ecosystem
• the economy
• Both the ecosystem and the economy
• None of these

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.

What are the greatest problems facing plants, animals, and people?

• introducing new species that  can cause problems 
• habitat destruction
• illegal hunting 
• all of the above

What is the variety of genes present?

• bidiversity
• species diversity
• extinction
• genetic diversity

Choose the correct answer for how humans negatively impact biodiversity.

• Logging

• Farming & land development

• Pollution

• Illegal hunting & collecting

• All of the above

A healthy forest ecosystem in the Northwest is home to elk, mule deer, chipmunks, ground squirrels, and a variety of plants. What is the relationship between biodiversity and available resources?

• Biodiversity is not affected by changes to available resources.

• Biodiversity decreases the amount of available resources.

• Biodiversity increases with abundant resources and decreases when resources are scarce.

• Biodiversity decreases with abundant resources and increases when resources are scarce.

Which statement is true?

• There are a small number of animals that live in the rain forest, and they belong to a small number of species.

• The population of animals in the rainforest is large and diverse.

• Many animals live in the rainforest, but there are just a few species that can survive there.

• There are many species living in the rainforest, but their populations are usually very small.