Which parts of the nitrogen cycle are involved in moving nitrogen from the atmosphere into the soil?
a. 3 and 7
b. 1 and 4
c. 4 and 6
d. 6 and 7

Do the following statements describe actin, myosin, both of the proteins or neither of the proteins? (a) contains a binding site for calcium (b) found in the i band (c) exists in a globular (g) form and a filamentous (f) form (d) contains a binding site for atp (e) is a component of the thin filament (f) is a component of the thick filament