NCEA Level 3 Biology – Speciation (AS91605) Practice Exam

Niche competition plays a crucial role in the evolution of new species by driving species to adapt to different resources. When species compete for the same resources in a shared environment, they may face intense competition that can limit their survival and reproduction. This competitive pressure encourages them to exploit different resources or habitats, leading to adaptive differentiation.

Over time, this process can result in the development of distinct traits and behaviors that allow species to occupy unique niches, reducing direct competition. Such adaptations can be anatomical, physiological, or behavioral. As these species become more specialized in their resource use, reproductive isolation may occur, ultimately leading to speciation, where new species arise.

The correct answer reflects how competition acts as a catalyst for evolutionary change by encouraging divergence in resource utilization, which is essential for the emergence of new species in an ecological context.