Certain diseases and cancers can cause the tissue type in a region to change. For example, a fictional disease causes the lining of the mouth to change from stratified squamous epithelium to simple columnar. Name one disease or cancer that causes a change in tissue types and explain the effects of the change of tissue types within that body region. Next, is the dermis of the skin a tissue or an organ? Explain why?

youre right there are

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.