Cells 2

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every living cell contains molecules of

Homeostasis in unicellular organisms depends on the proper functioning of

Which organism is considered an exception to the cell theory because it has a noncellular structure?

the respiratory system includes a layer of cells in the air passages that clean the air before it gets to the lungs. This layer of cells is classified as

The shape, size, and internal structure of the mitochondrion have been revealed by

In a cell, information that controls the production of proteins must pass from the nucleus to the

An organelle that releases energy for metabolic activity in a nerve cell is the

Cell organelles may be separated according to their densities by the use of