The Chesapeake bay is an estuary in United States. The presence of nitrogen and phosphorus in the estuary can cause harm to the aquatic species present there.
The main source of nitrogen in the Chesapeake bay is the agricultural runoff. The pesticides and the herbicides used in the agriculture may come along the runoff and get mixed with large rivers and water bodies. The nitrogen from agricultural runoff accounts approximately 40% of the total sources of nitrogen.
Hence, the correct answer is agricultural runoff.
Two nucleotides on the same strand form a <u>Phosphodiester bond </u>while two complimentary bases on opposite strands form <u>Hydrogen bonds</u>. An a-t base pairing forms <u>2</u> such bonds.
The constituent components that make up DNA's double-helix structure are known as nucleotides. Each nucleotide has a base in it. The four various colors you see here stand for the four different bases that might be used. Between nucleotides, a unique kind of covalent link known as a phosphodiester bond occurs. The two strands of DNA are formed by these phosphodiester linkages.
Hydrogen bonds are the bonds that develop between base pairs. Thymine and adenine make two hydrogen bonds, and guanine and cytosine form three hydrogen bonds. Therefore, we have concluded that hydrogen bonds are the type of binding that develops between base pairs in DNA to hold the two strands of a double helix together.
To know more about Phosphodiester bond visit the link:
brainly.com/question/23660733?referrer=searchResults
#SPJ4
Answer:
c hope it helps I'm soory if it u know what
