Put the steps of dna replication in order:

Helicase unwinds the DNA

DNA polymerase binds follows the leading strand

Hydrogen bonds form between bases

Two strands of DNA are made

Helicase unwinds the DNA, DNA polymerase binds, Hydrogen bonds, Two strands

Explanation:

It i salready in order. Some pictures on Google may help with this too.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint