Why do you think it is important that the sugar – phosphate backbone of dna is held together by covalent bonds, and the cross – bridges between the two strands are held together by hydrogen bonds?

electronic measurement tools display data on a screen after waiting for several minutes.

while some business owners prefer manual record keeping systems, most businesses use an electronic record keeping system - making it easier to capture information, generate reports and meet tax and legal reporting requirements.

explanation:

answer; (phospholipid);