59093
Centrioles can vary the number of microtubules and can be made of 9 doublets of microtubules ( as in " Drosophila melanogaster " ) or 9 singlets of microtubules as in " C. elegans " .
 C. elegans
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 C. elegans