Draw the hydrogen bonds between the bases. The letter R represents the rest of the nucleotide. The bases are positioned approximately as they would be in a DNA double helix. To indicate a hydrogen bond, simply draw a regular single bond between the atoms. Be careful not to modify the existing atoms or bonds in any way, nor add extraneous atoms or bonds. Draw the hydrogen bond(s) between thymine and adenine. Draw the hydrogen bond(s) between guanine and cytosine.

Adenine pairs with Thymine through two hydrogen bonds. Guanine pairs with Cytosine through three hydrogen bonds.

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Nucleic acids are composed of Nitrogenated bases.  

In the DNA molecule,

Two hydrogen bonds join the A-T pair, and three hydrogen bonds join the G-C.

Hydrogen forms bridges with nitrogen and with oxygen.  

You will find the image in the attached files

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Explanation:

The bond between adenine and thumb is a double bond while that between guanine and cytosine is triple bond.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: