3. If metabolism is chemical reactions-- what is the difference between "chemistry soup" in a beaker and biochemistry in a living cell? Define the "energy problem" that all chemical reactions present, then discuss the two molecules that cells use to solve that problem. Describe the process of how these two molecules work: that is, in addition to saying what they "do", be sure to include specific information about how it happens. It should be clear how the structure of these two molecules is important to getting their jobs done.

you can have just about every answer you can think of

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.