4959
Furthermore , testes of lizards from exposed locations had significantly larger seminiferous tubule diameters , significantly higher number of spermatogenic layers and displayed an up - regulation of thyroid hormone receptors when compared with lizards from reference areas .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None