Category A and E Pesticide Practice Test

The choice of plant species present in an ecosystem is indeed a living aspect because plants are fundamental components of the biological community. They not only contribute to the biodiversity of the ecosystem but also play critical roles in processes such as photosynthesis, oxygen production, and serving as a food source for herbivores and other organisms. The variety of plant species influences the overall health and function of the ecosystem by supporting numerous interactions among various living organisms, from insects to large mammals.

In contrast, the other options pertain to physical or abiotic factors that, while essential for the survival of living organisms, do not constitute living components themselves. Soil temperature, water availability, and sunlight exposure are crucial environmental factors influencing the growth and distribution of living organisms, but they do not embody life. Understanding the difference between living and non-living aspects of ecosystems is important for effective ecosystem management and conservation practices.