Cells transport molecules into the cell in many different ways. One method is through endocytosis, shown in the model. In endocytosis the cell brings specific molecules it needs including fluid into the cell why does the structure of the plasma membrane make this type of transport necessary for fluids?

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

b.

not too sure but maybe in the hot springs.

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.