Which of the following must occur before DNA replication can take place?

i cant see the options but i believe its Separation of the DNA double helix. DNA does not separate into codons.

Explanation:

Hope this helps !

-BB

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.