title: Change in arrangement of blastomeres in early stages of cleavage in the mollusk Lymnaea stagnalis L. as a result of combined effect of urea and centrifugation.
mesh_terms: D000818:Animals; D002498:Centrifugation; D005260:Female; D008195:Lymnaea / Q000166:cytology*; D008938:Mitosis / Q000187:drug effects*; D010063:Ovum / Q000166:cytology / Q000187:drug effects / Q000254:growth & development*; D014508:Urea / Q000494:pharmacology*
chemical_list: D014508:Urea