Why protoplasm is made 70-85% H2O?
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Answer:
Protoplasm is an old term, which means the living substance that makes up a cell. It is no longer much used. Biologists prefer to talk about the cytoplasm and the cell nucleus.

Plant cells have strong walls, and inside the wall is a cell membrane, then a thin layer of cytoplasm with the nucleus and other organelles in it. The cytoplasm is pressed against the cell wall by the very large vacuole. In this picture the cell nuclei are dark-coloured.
In plant cells, it is surrounded by a cell wall. In animal cells, the whole cell is made of protoplasm, surrounded by a cell membrane. Protoplasm in living beings is made up of about 75–80% water. However, this is rather misleading because the cytoplasm is full of structures called organelles, which do various tasks. The endoplasmic reticulum is the largest of these structures; there are many other organelles.
The word "protoplasm" was first used in 1846 by Hugo von Mohl to describe the substance in plant cells, apart from the cell wall, the cell nucleus and the vacuole. After the invention of the electron microscope it was clear that a living cell is much more complicated than von Mohl knew.
Explanation:
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Answer:
protoplasm is made of 70 -85 % of H2O bcoz The water forms the dispersion medium in which other elements lie suspended. water is free water in which various inorganic substances and organic compounds are found dissolved.