Question

Which organism is an exception to the cell theory?

Answer 1

The main exception to cell theory is the special case of viruses. Viruses lack the ability to generate energy on their own, and also generate no waste products, both hallmarks of living organisms. Viruses also lack the ability to replicate without first invading a host cell.

Answer 2

Viruses are exception.

Two Germans M.J. Schleiden (Botanist in 1838) and Theodor Schwann (Zoologist in 1839) collectively formulated the cell theory.

And in 1855 a German physiologist, Rudolf Virchow proposed this.

He gave the phrase : "Omnis-cellula-e-cellula".

This phrase means- All cells arise from pre existing cells .

Cell theory features :

• Cell is the basic unit of structure of plants and animals both.

• It is the basic unit of function as well as the metabolic reactions take place inside the cell.

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