What is the main difference between endocytosis and receptor mediated endocytosis?

Explanation:

endocytosis take particles to the cell that are too large to passively cross the cell membrane .phagocytosis is the talking in of large food particles while pinocytosis take in liquid particles .receptor mediated endocytosis use special  receptor proteins  to help carry  large particles across cell membrane .

the particle coming into the cell first binds to a protein on the cell membrane.

Explanation:

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.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.