Bacteria in plant roots perform most nitrogen fixation.

Which of the following statements is true?

Primary succession is...?

Which of these would most likely be a pioneer species?

Secondary succession is when...?

A savanna...?

Biodiversity is...?

If water, carbon dioxide, and nitrogen were not recycled, what effects might that have on life on Earth?

Plants releasing water vapor is...?

When an animal dies and decomposes, what gases are released?

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