USDA Phytosanitary Practice Exam

Question: 1 / 400

What defines the term "invasive species"?

Native species that have adapted to environmental changes.

Non-native species that spread rapidly and disrupt local ecosystems.

The term "invasive species" is defined primarily by its ability to be non-native to an ecosystem and to spread rapidly, leading to significant disruption of local ecosystems. Invasive species often outcompete native species for resources such as food, water, and habitat, which can result in decreased biodiversity. They can also alter habitat structures and nutrient cycling, which negatively impacts the ecological balance.

The characteristics of invasive species include not only their non-native status but also their capacity to thrive in a new environment, often due to a lack of natural predators or diseases that would typically control their populations. This unchecked growth can lead to consequences that affect both the environment and human activities, such as agriculture and forestry.

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This species is crucial for the ecosystem's health.

Species that are on the endangered list.

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