Which of the following statements about biogeochemical cycles is true?
a.
biogeochemical cycles are cycles involving only nonliving components.
b.
the rock cycle is a biogeochemical cycle.
c.
biogeochemical cycles are not an important part of the earth system.
d.
carbon, nitrogen, and oxygen cycles are biogeochemical cycles.
c?

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.