The form of nitrogen most usable to plants is
a. Ammonia
b. nitrogen gas
c. Proteins
d. Nitrates
e. Methane
D
You might also like to view...
The Environmental Protection Agency administers the ____________________ that sets the standards for allowed levels of key water pollutants.
Fill in the blank(s) with the appropriate word(s).
Using Figure 13.1 and your graphs in Figure 13.2, note the relationship between the environmental lapse rates on each graph you made and the DAR and MAR. Determine which stability condition describes each of the three graphs you have completed. Hint: Compare each ELR plotted with the relations in Figure 13.2.
Stability graph (a)
Stability graph (b)
Stability graph (c)
Phytoplankton use all of the following as part of the cell structure except ________.
A. cellulose B. iron C. calcium carbonate D. silica
What type of tide occurs when the Sun, Moon, and Earth form a right triangle in space?
What will be an ideal response?