1 When struck, crystal produces a musical ring. 2  Glass does not. 3  If you wet your finger and run it around the rim of a crystal glass it will also produce a musical tone. 4  Crystal can be worked thinner than glass, so if the rim of a piece is exceptionally thin it's probably crystal.
Nucleus: They are the membrane bound organelles, which are found in all eukaryotic cells. It is the very important organelle of a cell as it controls the complete activity of a cell and also plays a vital role in reproduction.t forms a connection between nuclear envelope and the cell membrane of a cell. Mitochondria: They are rod shaped organelles, plays an important role in releasing energy and they are the powerhouse of a cell. In plant cell, they are the sites of cellular respiration.
Functions of the Cell Membrane. Both eukaryotic cells, including plant cells and animal cells, and prokaryotic cells, e.g. bacteria, are enclosed by a cell membrane. A cell membrane (see the simple diagram on the right) is a thin structure that is also known as the plasma membrane. The main functions of the cell membrane are: to maintain the physical integrity of the cell - that is to mechanically enclose the contents of the cell, and also.