DP Environmental Systems and Societies Questionbank

Zebra stripes may reduce the ability of the biting flies to land on the zebra. Describe how natural selection may have led to the evolution of zebra stripes in response to biting flies.

Describe what may have caused the deviation from the trend line at point X in Figure 2.

With reference to Figure 2, identify when the diversity of species was lowest in the past 400 million years.

Outline the role of natural selection in increasing the diversity of species.

Identify the relationship between the number of continents and the diversity of species during the past 250 million years.

Describe two reasons why there is a relationship between the number of continents and the diversity of species.

Identify four reasons why the genetic diversity of a population may change over time.

Explain why Madagascar has a high number of endemic species.

With reference to Figure 2 identify three factors that could explain the high biodiversity in Ecuador.

State two possible causes of these past mass extinctions.

Outline how the process of natural selection is a mechanism for evolution.

With reference to Figures 4(b) and 4(c), suggest how fish diversity may be influenced by the habitat diversity of the Coral Triangle.

With reference to Figures 3(a) and 3(b) describe the trends in Iceland’s population dynamic

Suggest why the St Lawrence River beluga whale population has not recovered despite being given protected status in 1983.

Outline the factors that contribute to total biodiversity of an ecosystem.