Question

Obligate endosymbionts that are inherited strictly from mothers to offspring over very long evolutionary periods O a. cannot be engaged in mutualistic interactions with their host, because they require nutrients from the host for their own reproduction O b. are also typically inherited from fathers to their sons, via the cytoplasm of the sperm O c. cannot change the traits their host organisms express O d. have an association with their host that is not shaped by natural selection, because the association changes the fitness of the endosymbiont, but not fitness of the host O e. often show dramatic shrinkage in their genomes

Answer 1

ANSWER

(e) Often show dramatic shrinkage in their genome

Extreme genome reduction has been observed in obligate intracellular insect ... to overall genome shrinkage, we found that the largest proteins in the ... mutation rates commonly observed in endosymbiotic lineages .selection where they exhibit dramatically longer or shorter lengths, but ...