Leaving Certification Ecology Practice Exam 2025 – All-In-One Study Guide for Success!

The ozone layer plays a vital role in protecting ecosystems by filtering out harmful ultraviolet (UV) radiation from the sun. This layer, located in the stratosphere, absorbs the majority of the sun’s UV radiation, which can cause significant harm to living organisms. High levels of UV radiation can lead to increased instances of skin cancer and cataracts in animals, including humans, and can adversely affect plant life by inhibiting photosynthesis and damaging cellular structures. By mitigating these harmful effects, the ozone layer helps maintain the overall health of both terrestrial and aquatic ecosystems, promoting biodiversity and the stability of food webs.

The other options do not accurately represent the primary function of the ozone layer. While some may contribute to ecological health in various ways, they do not capture the critical protective role that the ozone layer plays against UV radiation exposure.