What did Robert Virchow observe when he witnessed a cell dividing in half?

The correct answer is - all cells arise from pre-existing cells.

Explanation:

Robert Virchow observed during the cell division in half that a single cell divide into two new cells therefore he suggested that, a famous aphorism Omnis cellula e cellula which means all cells arise from pre-existing cells. His observation is one of the major points of the cell theory.

This observation made by Robert Virchow becomes the fundamental basis of the cell theory which describes that cell divides to produce new cells. The other greatest observation made by him was that all cells not get sick or affected but a group of cells only.

the form of energy changes and the total energy increases0l

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus