A scientist has developed a method for depositing laminin on the surface of tissue culture dishes. She expects to make a fortune by selling these dishes as improved adhesion surfaces for in vitro studies of all types of cell. What is your opinion?

Laminin refers to an extracellular protein, which exhibits the characteristic of binding the cells with each other, that is, possessing adhesive features. Generally, fibronectin is used for adhesion, however, it has also been found that coating of laminin can also be used for adhesion.  

Laminin works in adhesion as it possesses three shorter arms that help in sticking other molecules together and assists in the formation of sheets. Laminin can also help in making the properties of adhesion better by combining with the receptors like integrin-binding receptors and the receptors present on the surface of the plasma membrane. Hence, in my opinion, using laminin on the surface of tissue culture dishes can improve the property of adhesion much more.  

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.