Practise MYP Biology questions on 8.2 Human Influences and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
Which of the following best explains why large-scale human disturbances are more severe than small-scale ones?
How do invasive species primarily disrupt the stability of an existing ecosystem?
The loss of a single species in a simplified ecosystem has a large impact because there are fewer species remaining to perform specific __________.
The process where humans replace diverse habitats with uniform landscapes, such as monocultures, results in a(n) __________ in the number of ecological roles performed.
When humans simplify an ecosystem, the loss of stability is primarily due to the reduction in the variety of __________.
Small-scale disturbances are always permanent.
Large-scale changes eliminate the nearby sources of organisms needed for recovery.
Large-scale changes allow ecosystems to adapt more quickly.
Only large-scale changes involve the extraction of resources.
By increasing the genetic diversity of the native population through interbreeding
By providing a new and unlimited source of food for all native predators
By decreasing the total amount of solar radiation reaching the ground
By altering established food webs and outcompeting native species for resources
carbon cycles
ecological roles
trophic levels
metabolic pathways
stabilization
increase
diversification
reduction
local weather patterns
ecological roles performed by different species
fossil fuels available
abiotic factors
