Bacterial species that live entirely inside eukaryotic cells have deletions of genes for the synthesis of molecules that can be taken in from the host cell. This finding implies that the deletions are:

Question

Quizplus · Accepted Answer

The deletions are random, but those that delete unneeded genes are not deleterious, allowing the bacteria to survive and thrive without those genes.

Bacterial Species That Live Entirely Inside Eukaryotic Cells Have Deletions