Assertion: centriole's structure | /r/HasProperty | evolved
Facets:
value: during evolution
type: TEMPORAL
Source sentences:
text: Although the question why flagella and cilia as well as centrioles represent nine-fold radial symmetry is still unanswered, it is considered that ancient axonemes already showed motile 9+2 structures and their variants in structures and motility are evolved during evolution.