What was rudolph virchow’s contribution to the cell theory?
a. he concluded that all cells come from preexisting cells.
b. he concluded that cells are the basic units of structure and function of all living things.
c. he concluded that all organisms are composed of cells.
d. he concluded that all cells are similar in composition and metabolic activities.

A: He concluded that all cells come from preexisting cells

Explanation:

The modern cell theory has 3 parts;

The development of the cell theory has the contributions of several scientists but the most noticeable among them are Matthias Scheleiden, Theodore Schwann and Rudolf Virchow.

Rudolf Virchow specifically built on the work of other scientists such as Theodore Schwann and Robert Remak to disprove the theory of spontaneous generation and propound the theory of cells arising from preexisting cells.

The correct answer is A

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: