“Nonevolution” of the appearance of mitochondria and plastids in eukaryotes

“Endosymbiont theory was first developed and popularized by Lynn Margulis in the early 1980s. The idea proposes that mitochondria were originally protobacteria that were engulfed by an ancestral cell but not digested. As a result, this ancestral cell became heterotrophic (i.e., human and animal cells). Plastids (i.e., chloroplasts) were originally cyanobacteria that were engulfed by an ancestral cell but not digested. This ancestral cell became autotrophic (i.e., plants). These organelles share some characteristics with bacteria including circular DNA, division by binary fission, and membrane and ribosome similarities.

On the surface this process seems simple, but these organelles and their relationship to the cell are extremely complex. For example, not all the proteins necessary for the functioning of the organelles are found in their own genomes. Instead, some of the protein codes are found in the nucleus of the cell. Organelle proteins not made in the organelle must be transferred into the organelle. This involves complex protein transfer machinery comprised of multiple pathways, each involving numerous proteins for the transport of proteins into mitochondria and plastids. How does a transport pathway made of multiple parts, all necessary for the proper functioning of that pathway, evolve in slow incremental steps? It can’t because of evolution’s “use it or lose it” mechanism; so it must have been designed by a Creator God all at once and fully functional.” Exposing Evolution, Second Ed., “Nonevolution” of the appearance of mitochondria and plastids in eukaryotes—challenges to endosymbiotic theory, Purdom. www.answersingenesis.org/cec/docs/endosymbiotic-theory.asp

Response to comment [from a Catholic]:  "bacteria"

Since the nuclear membrane is intended to prevent DNA contamination, how did a bacterium get its DNA into the nucleaus of another cell and then evolve into a chloroplast or mitochondria?

“Nonevolution” of the appearance of mitochondria and plastids in eukaryotes