46766
Trophozoites have a ploidy of four and the ploidy of cysts is eight , which in turn raises the question of how " Giardia " maintains homogeneity between the chromosomes of the same and opposite nuclei .
 Giardia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Giardia