Question

What are the Merits & demerits of cell theory?

Answer 1

Structure of virus- Schleiden and Schwann could not explain the structure and functioning of virus cell. They said that the function of body is coordinated function of cell which is not true in the case of virus because it only starts it's functioning when hosted by bacterial, plant or animal cell.

Prokaryotic cells- The cell theory do not holds true in the case of Pk cells because they do not have any well defined nucleus.

Multinucleate condition- The cell theory says that each cell have A NUCLEUS, but there are certain cells like tapetal cells that are coenocytic.

Cells without nucleus- According to cell theory there should be a nucleus in every cell, but human RBCs, sieve tubes of angiosperm are some of the cells lacking nucleus.