A wildfire destroys most of the vegetation in a forest ecosystem. Over the next several decades, grasses, shrubs, and finally trees begin to grow back in a predictable series of changes. Which term best describes this ecological process?

Which of the following describes a density-independent limiting factor that could affect a population of white-tailed deer?

Which statement best describes the role of decomposers in the cycling of matter within an ecosystem?

Which of the following describes a symbiotic relationship where one organism benefits and the other organism is neither helped nor harmed?

Which statement best describes how the greenhouse effect impacts the Earth's biosphere?

A scientist is studying a population of fish in a lake. He notices that as the fish population increases, the amount of dissolved oxygen in the water decreases, which eventually leads to a decrease in the fish birth rate. In this scenario, dissolved oxygen is an example of what?

Which of the following describes the difference between an organism's habitat and its niche?

An invasive species of plant is introduced into a new ecosystem with no natural predators. Which of the following describes the most likely initial growth pattern of this population?

Which of the following processes is responsible for moving carbon from the abiotic atmosphere directly into the biotic components of an ecosystem?

In a forest ecosystem, a sudden increase in the population of primary consumers occurs. Which of the following is the most likely long-term effect on the ecosystem's stability?

Which of the following describes the most likely impact on a local ecosystem when an excess of nitrogen and phosphorus from agricultural runoff enters a freshwater lake?

An invasive species of plant is introduced into a wetland ecosystem. This plant grows faster and taller than the native species, eventually shading them out. Which statement describes the most likely impact on the biodiversity of this ecosystem?

Which of the following describes the relationship between a remora fish that attaches to a shark to eat leftover scraps of food and the shark, which is neither helped nor harmed by the fish's presence?

A small group of lichens begins to grow on a bare rock surface after a volcanic eruption. Over many years, the rock is broken down into soil, allowing mosses and then grasses to grow. Which ecological process is being described?

A scientists observes a population of fish in a lake. Over several years, the population size stays near a specific level despite seasonal fluctuations. Which ecological term best describes this maximum population size that the environment can support?