Nuclear changes of treptional nature in the differentiation of sperm nurse cells in snails.
D000818:Animals; D002454:Cell Differentiation; D002467:Cell Nucleus; D003593:Cytoplasm; D004247:DNA / Q000378:metabolism; D006066:Gonads / Q000166:cytology; D008297:Male; D011123:Polyploidy; D012908:Snails; D013094:Spermatozoa / Q000166:cytology*
D004247:DNA