Biology Regents Practice Exam

Which of the following activities leads to a stable ecosystem?

1. Deforestation to create more space for species

2. Mowing a field for recreation

3. Allowing native plants to grow undisturbed in an abandoned field

4. Spraying pesticides on a field at the end of the growing season

The correct answer is: Allowing native plants to grow undisturbed in an abandoned field

Allowing native plants to grow undisturbed in an abandoned field promotes a stable ecosystem because it encourages the natural processes of succession and biodiversity. Native plants are adapted to the local environment and provide essential resources such as food and habitat for various species, including insects, birds, and other wildlife. This creates a balanced ecosystem, where different species can coexist and support each other, thus enhancing resilience to environmental changes. In contrast, activities like deforestation, mowing, and spraying pesticides can disrupt ecosystems. Deforestation reduces habitat and biodiversity, mowing can destroy habitats and prevent species from completing their life cycles, and pesticide use can have harmful effects on non-target species and reduce biodiversity. These actions can lead to an imbalance in the ecosystem, making it more vulnerable to disturbances.