Question

which experiments led to changes to the original cell theory?
o experiments that showed that blood cells transport gases, waste, and nutrients throughout the body
o experiments that showed that all cells are similar in how they metabolize and in their composition
o experiments that transplanted synthetic chromosomes into bacterial cells to create a new species
o experiments that established the existence of single - celled organisms and microbes

Explanation:

The original cell theory stated that all cells come from pre - existing cells. The experiment of transplanting synthetic chromosomes into bacterial cells to create a new species challenges the traditional view of cell origin and development, thus leading to changes in the original cell theory. The other options either describe normal cell functions (blood cells transporting substances), cell similarities (similar metabolism and composition), or the discovery of cell types (single - celled organisms and microbes) which do not fundamentally change the cell theory.

Answer:

experiments that transplanted synthetic chromosomes into bacterial cells to create a new species