The earliest form of life known on earth was? a leafy plant b bacteria c fossil d single celled organism

C

And well yeah thats it have a good day :)

the correct answer is C) fossil

Hope it helps

answer; i believe the answer is (polygenic inheritance;

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products