Can someone tell me what this is? The chapter's name is Active Transport (on my PPT).

Exocytosis

Explanation:

"a process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane."  

You can tell because the content is exiting the cell and fusing with the cell membrane.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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.