Aresearcher was studying mutations in bacteria. he found that certain bacteria had changes in their dna that allowed them to be resistant to antibiotics

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

how do heroes resolve conflicts in beowulf?

question 15 options:

they sue each other in court

they get a mediator

the seek counseling

they get even or take revenge

explanation:

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