Mitosis is a form of asexual reproduction in which genetic recombination does not take place; the daughter cells are identical to the parent cell. Prokaryotes are able to divide asexually using binary fission, producing two exact copies of the parent cell. The mechanisms governing binary fission are quite different from those governing mitosis, but the end result is the same.

The other three options are examples in which prokaryotic genetic recombination takes place. Conjugation involves the transfer of genetic material between two bacteria via a sex pilus. Transduction is the transfer of genetic material to a bacterium via a vector, such as a bacteriophage. Transformation occurs when the bacterium uptakes exogenous DNA from the environment.

We must first find out how long a doubling cycle is for this strain.  We can determine the following relationships from the information in the question.

So, in two hours, the bacteria has undergone three doubling cycles from 20000 to 160000. That means the doubling time is one-third of two hours, or one-third of 120 minutes.

The doubling time is 40 minutes.

The bacteria will undergo 15 doubling cycles in 600 minutes, or ten hours.

Protists, fungi, plants, and animals are eukaryotic, while bacteria are prokaryotic. The rest of the answer choices are characteristic of prokaryotic cells.

Organelles are only found in eukaryotic cells which set them apart from prokaryotic cells.

This question is asking about one of the differences between eukaryotes and prokaryotes.  While both eukaryotes and prokaryotes use DNA to encode their genetic information, making "DNA" incorrect, remember that prokaryotes lack membrane-bound organelles.  \This makes both "ribosomes" and "phospholipid cell membrane" incorrect, because neither of them are membrane-bound organelles. We are left with "nucleus," which is the correct answer.

One of the key differences between prokaryotes and eukaryotes is that prokaryotes have no membrane bound organelles, therefore, prokaryotes would not have mitochondria. Prokaryotes have a plasma membrane for protection, ribosomes for protein production, RNA in the form of mRNA, tRNA, and rRNA, and DNA polymerase to replicate their DNA.

The characteristic that defines a eukaryote is the presence of membrane bound organelles, such as the nucleus, mitochondria, Golgi body, and chloroplasts. Both eukaryotes and prokaryotes have ribosomes, DNA and RNA, and and electron trasnsport chain. Bacteria and plants have cell walls but not all eukaryotes do, so it is not a defining characteristic.

Prokaryotes do not have membrane-bound organelles, such as the nucleus or mitochondria. In fact, endosymbiotic theory suggests that mitochondria evolved from symbiotic prokaryotic relationships. Prokaryotes are often associated with all of the other characteristics listed.

Membrane bound organelles are specific only to eukaryotes. Circular DNA is only present in prokaryotes. Rough endoplasmic reticulum is only present in eukaryotes, as all prokaryotic ribosomes are cytoplasmic. Although prokaryotes have circular DNA, both eukaryotes and prokaryotes have double-stranded DNA.

Prokaryotes like Neisseria do not have mitochondria, while eukaryotic human cells do. In fact, prokaryotes probably gave rise to the first mitochondria via the theory of endosymbiosis.