If the producers in an ecosystem provide 250,000 kcal of energy to the consumers, how much energy would be available to a 1st level consumer?

Which of these is NOT a process in the Carbon Cycle

The air in our atmosphere is made MOSTLY of:

Events that affect a population regardless of its size, such as a major flood or deforestation, are known as:

Most organisms cannot directly use nitrogen gas. What type of organism can?

Which process removes carbon dioxide from the atmosphere?

When an existing ecosystem experiences a major disturbance, such as a wildfire, the community can replace itself over time through...

Predation, disease, and parasites can affect the size of a population but their effect depends on how many individuals are in the population to begin with. Therefore, these are known as:

In any given ecosystem, there should be more ___ than any other type of organism.

Which organisms are pioneer species during Primary Succession?

New communities can become established in an area where nothing has live before - such as new volcanic islands - through which process?