.
Reactions are catalyzed by
a) nitrogen
c) Enzyme
b) potassium
d) magnesium​

not sure if this what   you'r looking for would be percent composition

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.