A solution contains 15ppm of benzene. The density of thesloution is 1.00g/ml. This means that
a) the solution is 15% by mass of benzene
b) 100g of the solution contains 15g of benzene
c) 1.0g of the solution contians 15 x 106 g ofbenzene
d) 1.0 L of the solution contains 15g of benzene
e) there are 15 mg of sodium chloride in 1.0g of thesolution

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.

answer/// the nucleoid region contains dna; ///

what is the question?