Biodiversity serves many ecological functions that are important to the biosphere. Which of these is an example of such a function?
A. Removing atmospheric oxygen
B. Decreasing biological productivity
C. Increasing erosion
D. Recycling nutrients

Sydney drew a flow chart to illustrate the nitrogen cycle. which labels best complete the flow chart? x: producers undergo photosynthesis. y: nitrogen compounds are released into the air. x: nitrogen compounds are released into the air. y: producers undergo photosynthesis. x: free nitrogen is in the atmosphere. y: producers absorb nitrogen compounds through their roots. x: producers absorb nitrogen compounds through their roots. y: free nitrogen is in the atmosphere.

In what way are cities microclimates?

What is the relationship between absorbance of light and the rate of photosynthesis?