IB DP Biology Mock Exam SL Paper 2 Set 1 - 2025 Syllabus
IB DP Biology Mock Exam SL Paper 2 Set 1
Prepare for the IB DP Biology Exam with our comprehensive IB DP Biology Exam Mock Exam SL Paper 2 Set 1. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
▶️ Answer/Explanation
(a)
Keystone species have a disproportionately large impact on their ecosystem relative to their abundance. They are critical for maintaining the stability and structure of the community, regulating populations of other organisms, and preventing ecosystem collapse.
(b)
Biodiversity is important for ecosystem health for several reasons:
• High biodiversity leads to more complex food webs, providing varied and resilient food sources.
• This complexity creates a more stable and sustainable ecosystem that is better able to adapt to change and resist damage.
(c)
1. Habitat restoration: This involves rehabilitating degraded habitats and re-establishing connectivity between fragmented areas (e.g., habitat corridors), allowing natural processes to resume.
2. Minimizing human impact: This involves reducing or eliminating human activity (such as farming or development) in the area to allow for the natural processes of regeneration and recovery to occur without interference.