In order for plants to absorb nitrogen, it must be transformed first and is called

Nitrogen enters food chains through ________.

According to the diagram in Figure 6.3, what organism converts atmospheric nitrogen into nitrogen compounds that will later be used by plants?

In Figure 6.3, which process converts nitrogen gas in the air into

Excessive use of ________ on lawns and gardens can affect the nitrogen and phosphorus cycles in nearby lakes and streams.

Bacteria transform atmospheric nitrogen into nitrates for plants to use during a process called ______________.

The process by which plants absorb ammonia or nitrates is

Which of the following burn fossil fuels and/or are releasing many different chemicals into the atmosphere that are harmful. Pick more than one.

When algae die, oxygen concentration drops, which kills fish and other aquatic organisms. Which process below causes this problem