In the space below, label each of the steps on the diagram, and include a brief description of each step. --> Nitrogen Fixation
--> Nitrification
--> Denitrification
--> Assimilation
--> Decomposition

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

Anton created a chart listing different types of materials. which best complete the chart?

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?