Question

Why did Pasteur's work lead to a change in modern cell theory?

Answer 1

He created great controversy among scientists, and to settle the dispute, cell theory was adjusted to include both spontaneous generation and the idea that cells come from pre-existing cells.
He showed that the broth was composed of micro-organisms which needed air, showing that cells need oxygen for cellular respiration.
His work, which was documented and repeatable, contradicted the accepted cell theory, so a change in the theory was required.
His reputation as a great scientist convinced other scientists to accept his work and change cell theory.

Answer 2

well as far i know schlieden and schwann given cell theory but they lack in answering how the new cell arises do Robert hooke study them and given his statement that new cells arises from pre exisiting cell through binary fission so we saycell theory i given by schlieden and schwann but modern cell theory given by robert