Quick

dna and rna are both
1. made up of nucleotides and carry molecules from one end of a cell to another
2. monomers of protein molecules that provide structure to a cell’s nuclear membrane
3. protein molecules that carry the unique genetic information of an organism
4. molecules that contain genetic information and are made up of nucleotides

1. Made up of nucleotides and carry molecules from one end of a cell to another

cuz he is really really short, assuming an unorthodox and inherently unlucky configuration of elevator buttons…

explanation:

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.