EduNinja
Figure 1(a): Extinction risk levels of species in global biodiversity by category
Figure 1(b): Changing species extinction risk by category 1980-2015
Figures 1(a) and 1(b) are based on records for species diversity. Identify one other factor that may be measured to assess the diversity of life on Earth.
Figure 1(a): Extinction risk levels in global biodiversity
Figure 1(b): Changing species extinction risk 1980-2015
Figures 1(a) and 1(b) are based on records for species diversity. Identify one other factor that may be measured to assess the diversity of life on Earth.
The family Leporidae includes hares and rabbits. The figures show four species that can be found in western North America.
Figure 1(a): Four species of the family Leporidae
Figure 1(b): A dichotomous key for species A to D
Figure 1(c): Sagebrush ecosystem without invasive cheatgrass
Figure 1(d): Sagebrush ecosystem with invasive cheatgrass
Distinguish between the biodiversity of the sagebrush ecosystems in
Figures 1(c) and 1(d).
Figure 2: Distribution of continents and diversity of species over time
With reference to Figure 2, identify when the diversity of species was lowest in the past 400 million years.
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.
Outline the role of natural selection in increasing the diversity of species.
Explain how natural processes may lead to the formation of new species.
Explain how tectonic plate activity may lead to the formation of new species.
Outline the mechanism of natural selection.