What type of energy is considered a nonrenewable source?

An ecologist examining several different ponds discovers that in one pond all the frogs are female. Which of the following most likely led to the all-female population of frogs?

Which of the following would be most likely to occur in the scenarios that have experienced habitat loss and/or fragmentation in the diagram?

Which curve in the graph best represents a K-selected species?

Which of the following correctly pairs a greenhouse gas with its primary anthropogenic source?

Which of the following best describes a supporting ecological service provided by wetlands: Wetlands serve as a source of aesthetic inspiration for art and literature. Wetlands provide a habitat for a wide variety of organisms. Wetlands provide opportunities for ecotourism, which provides revenue to the local economy. Wetlands serve as a major reservoir for nitrogen in the nitrogen cycle.

Which of the following is a possible effect of global climate change as illustrated in Scenario 1? Increased sea level would reduce the size of the habitat patches. Increased carbon dioxide availability spurs plant growth, which would increase habitat size. Decreased temperatures would cause unsuitable abiotic conditions. Decreased precipitation would eliminate habitat patches.

This energy source is used to generate electricity with photovoltaic (PV) cells.

This type of energy utilizes heat that is stored beneath Earth’s surface to heat water and produce steam.

This type of irrigation, often used in orchards growing tree crops, distributes water to plants through small parallel channels between crop rows but often leads to increased soil erosion in the field.

At which of the following locations in the stream was there most likely a discharge of excess organic matter into the water? A, B, C, D

Geothermal energy is the main energy source at this location because it is located on a large divergent boundary.

A farm is experiencing extensive crop loss due to high rains causing overly saturated soils. Which approach would best help the farmer alleviate the problem?

Which of the following is the best example of a tragedy of the commons?

In which of the following atmospheric layers does most weather occur?

Which of the following correctly explains a positive climate feedback loop found in the Arctic? Increased melting of permafrost increases Earth’s ability to absorb methane gas, which decreases greenhouse warming and decreases the melting of permafrost., Increased global temperatures lead to decreased sea ice coverage and decreased albedo, which further increases global temperatures., Increased evaporation and cloud formation decreases the amount of solar energy reaching the surface of Earth, which leads to cooler temperatures at the surface and decreased evaporation and cloud formation., Increased precipitation increases the size of high albedo snowpack in polar regions, which leads to increased habitat for Arctic organisms such as polar bears.

Which of the following best describes one way the Clean Air Act helped reduce air pollution?

Based on the diagrams above, what is the percent change in the amount of runoff in urban areas compared to forested areas?

Why can macroinvertebrate sampling be used to assess the overall health of a stream?