3/4:Biodiversity

1. Increased biodiversity equals increased sustainability decreased sustainability maintenanceof sustainability none of the above 2.An ecosystem contains organisms interacting with each other and their physical environments.Which of these is the best indicator of a healthy ecosystem? fewer decomposers many different species biotic factors decrease abiotic factors increase 3. An ecosystem will most likely remain stable if.. there are more predators than prey There are few herbivores It has a high level of biodiversity There is a large population of one species. 4. Biodiversity in an ecosystem is most likely to allow that ecosystem to.. survive and recover from a natural disaster be destroyed forever from a natural disaster become genetically population by the same species create new organisms 5. Which has the most biodiversity? a forest with a variety of plants and animals. a corn field with a certain species of corn. A forest that has been planted for use as lumber A fish tank with a few types of fish. A species of bee is the dominant group of pollinators in an ecosystem. A type of pesticide was sprayed, that killed all of the bees. Which of the following best explains its effect on the ecosystem? Because of the lack of pollinator biodiversity, the plants in this ecosystem will learn to pollinatethemselves and will grow more vigorously. Because of the pesticide use, the plant species in the ecosystem will flourish over a long periodof time. Because of the lack of pollinator biodiversity, the ecosystem will likely fail to sustain both its plantspecies and the plants' consumers. Because of the pesticide use, the plant species will not be harvested for food by any organisms inthe environment, causing them to flee. Students are designing miniature ecosystems in sealed jars. They want to create the mostsustainable system possible.Which combination of organisms is MOST LIKELY to create a sustainable ecosystem in a sealed jar? Ferns, earthworms, and pill bugs Moss, crickets, and a small lizard Cactus, sand, and a scorpion Venus flytrap, ants, and a small frog What could happen to an ecosystem with low biodiversity if one species goes extinct? The ecosystem will continue to function normally. The ecosystem will become stronger and more sustainable. The ecosystem will gain new species automatically. The ecosystem may become unstable and collapse.