The Living World-Biodiversity

The most important component of biodiversity is:

• Species diversity

• Genetic diversity

• Habitat diversity

• All of the above

Low genetic diversity is characteristic of:

• Populations with a wide distribution

• Populations that have experienced bottleneck evens in their history

• Endemic species

• Coastal populations

Ecosystem resilience refers to:

• The unchanging nature of ecosystems over time

• The ability to recover from external disturbances

• Ecosystems with high diversity

• A steady state of community biomass

The graph shows that:

• Pisaster causes a decline in species richness

• Species richness declines when Pisaster is removed

• Pisaster is a predator

• There is a maximum of 20 species in this ecosystem

Refer to the graph. The results of this experiment indicate that:

• The presence of Pisaster has no effect of community diversity

• The ecosystem has high diversity

• The ecosystem has low diversity

• Pisaster is a keystone species

Habitat loss has a disproportionate effect on :

• Endemic species

• Specialist species

• Species with large territories

• All of the above

Refer to the graphs, which show species richness on various islands in the Gulf of California. The graphs indicate that:

• Large islands most distant from the mainland have the highest species diversity

• Small islands most distant from the mainland have the highest species diversity

• Large islands close to the mainland have the highest species diversity

• Small islands close to the mainland have the highest species diversity.

Refer to the graphs, which show species richness on various islands in the Gulf of California. The data in the graphs provide supporting evidence for:

• Island endemism

• Island biogeography theory

• Mainland dispersal theory

• The richness of island biota

Products obtained directly from ecosystems for basic human needs are known as:

• Regulating services

• Provisioning services

• Cultural services

• Supporting services

Air and water purification are examples of:

• Regulating ecosystem services

• Provisioning ecosystem services

• Cultural ecosystem services

• Supporting ecosystem services