Genetic information is stored in long molecules with the abbreviated name of

Genetic information is stored in long molecules with the abbreviated name of genetic code which is a code consisting of three letters often referred to as codons in the strand of DNA.

Each code contains three letters in a unique combination each of which refers to a particular amino acid i.e. the three letter codon interprets for a single amino acid .

There are codes that indicate for the start and end of the polypeptide chain that will be formed resulting from the template DNA which first gets converted to m-RNA and then this strand contains the code for the resulting polypeptide chain.

i would say it is

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.