Assertion: dinoflagellate's number | /r/HasSubevent | a loss of genes
Facets:
value: over many millions of years
type: TEMPORAL
Source sentences:
text: A complementary theory suggests that the relatively small numbers of bacteria inside each insect decrease the efficiency of natural selection in 'purging' deleterious mutations and small mutations from the population, resulting in a loss of genes over many millions of years.