CH 7 Test

What does species diversity refer to?

• The number or variety of species in a particular region

• The size of individual species in a particular region

• The age of species in a particular region

• The color of species in a particular region

Speciation and ___ are key factors affecting species diversity.

What are the three components of biodiversity?

• Species diversity, genetic diversity, and ecosystem diversity

• Population diversity, habitat diversity, and community diversity

• Animal diversity, plant diversity, and fungi diversity

• Climate diversity, soil diversity, and water diversity

How does genetic diversity contribute to adaptation to local conditions?

• It provides raw material for adaptation

• It reduces the need for adaptation

• It limits the ability to adapt

• It has no impact on adaptation

Why may populations with more genetic diversity have better chances of survival?

• They are more resistant to diseases

• They have a wider range of traits to adapt to changing environments

• They are less likely to face inbreeding depression

• They have a higher population density

Ecosystem diversity refers to the number and variety of ___ within a given area.

How does high levels of biodiversity impact the stability of communities and ecosystems?

• Increases stability

• Decreases stability

• Has no impact on stability

• Causes instability

How can genetic diversity impact ecosystems?

• By destabilizing ecosystems

• By having no effect on ecosystems

• By reducing the resilience of ecosystems

• By having a stabilizing effect on ecosystems

What is one consequence of extinction?

• Increased biodiversity

• Loss of entire species

• Improved ecosystem resilience

• Enhanced species survival

What have scientists observed in recent decades regarding extinction rates?

• Decrease in extinction rates

• No change in extinction rates

• Higher than normal extinction rates

• Extinction rates are stable