Asap ?

another name for unicellular organisms that dominated earth up to the precambrian time is
a. cyanobacteria.
b. eukaryotes. (wrong)
c. prokaryotes.
d. stromatolites.

6. which of the following resources is a nonrenewable resource?
a. gold
b. carbon
c. river
d. tree(wrong)

b

is correct hope this   also i learnd this in middle school

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

answer; i believe the answer is hydraulic action;