Characteristically, enterococci are:

a. unable to grow in 6.5%nacl
b. relatively resistant to penicillin
c. na hippurate positive
d. bile esculin negative

b. Relatively resistant to penicillin

Explanation:

Characteristically, enterococci are relatively resistant to penicillin which means that this antibiotics may slower the growth but not able to kill bacteria.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called