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Savannas experience seasonal rainfall and are dominated by:

Wolves are removed from an ecosystem, causing deer populations to increase dramatically. This is an example of:

Increasing atmospheric CO₂ primarily contributes to:

Increasing greenhouse gases leads to warming that can alter global circulation. One likely consequence is:

Coastal regions where deep, nutrient-rich water rises to the surface are called:

An ecosystem with many species shows stable population sizes over time. This suggests:

In lakes, oxygen levels decrease in summer because:

Water vapor cools and forms clouds in the atmosphere. This process is:

Plants rely on sunlight to produce energy-rich molecules. What is the original source of this energy?

After a tree falls and decays, fungi break it down into nutrients. These fungi are: