IB Biology SL A4.2.6 Causes of Biodiversity Crisis Questions
Identify major human pressures, and for HL, explain how invasive alien species disrupt native biodiversity.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Identify human drivers such as urbanization, land clearance, agriculture, pollution and overexploitation as causes of biodiversity loss.
- Distinguish habitat conversion and resource-demand pressures that increase the risk of a global biodiversity crisis.
Learn this topic
IB Biology SL A4.2.6 Causes of Biodiversity Crisis Questions question 1
[Maximum number: 3]
Insect pollinators are vital to maintaining the biodiversity of ecosystems, but they are threatened by some human actions. Some pollinators, such as honey bees (Apis mellifera), produce honey, which is rich in glucose.
List human actions that could threaten populations of insect pollinators such as bees.
a. use of pesticides/insecticides (which may kill/harm pollinators);
b. urbanization;
c. loss of habitat/change of land use (monocultural/intensive farming practices);
d. use of herbicide or removal of "weeds" reducing food sources;
e. introduction of alien species;
For a. or d. the mention of a specific pesticide or herbicide would be ok.
3
Marking guidance:
max
All question bank results loaded