Describe the cell membrane, cell wall, nucleus, and cytoplasm. which of these structures are you likely to find in a prokaryotic? eukaryota cell? plant cell? animal cell?

The cell membrane lets substances come in and out of the cell. This is found in plant and animal cells. The cell wall acts like a barrier or a wall for the cell, and this is only found in a plant cell. The nucleus is basically the 'brain' of the cell. This is found in both plant and animal cells. It is only found in eukaryotes. The cytoplasm is a gel-like fluid that fills up the cell.

a symbiotic relationship with the mitochondria

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.