Question detail
What role do keystone species play in cold environments?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Section B: The living world
Question
- A. They are the most abundant species in the ecosystem.
- B. They have a disproportionately large impact on their environment.
- C. They are the first species to colonize an area.
- D. They are always the largest animals in the ecosystem.
Answer
The correct answer is They have a disproportionately large impact on their environment..
Explanation
The correct option is They have a disproportionately large impact on their environment.. They have a disproportionately large impact on their environment. is correct because it directly matches the approved learning objective to explain issues related to biodiversity in cold environments. This belongs to Cold environments (optional route) within Section B: The living world, so the answer must stay focused on the geographical process, evidence, place, or impact named by the curriculum. The other options are weaker because they move away from Cold environments (optional route), reverse the geographical relationship, or make a broader claim than the objective supports.
Common mistake
Misunderstanding Biodiversity
Students often confuse biodiversity with the number of species in an ecosystem, overlooking the importance of genetic diversity and ecosystem diversity.
To fix this, students should study the different levels of biodiversity: genetic diversity within species, species diversity, and ecosystem diversity, and understand how each contributes to the overall health of cold environments.
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