Â­Mesoamericans began writing during the mid-Pre-classic period. The Mayans were the first to keep any sort of historical record, and the beginnings of the calendar were born. The Mayans used stelae, or stone monuments, to carve their civil events, calendars and astronomy knowledge. They also inscribed their religious beliefs and mythology on pottery.
The nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. It is commonly the most prominent organelle in the cell. The nucleus is surrounded by a structure called the nuclear envelope.
perhaps that could be your difference. a RBC is a type of animal cell, and animal cell is not a type of RBC. OK, so a more obvious difference would be that most standard animal cells have nuclei were as RBCs do not. or RBCs have hemoglobin, other animal cells do not.evel-an animal cell is eukaryotic whereas a red blood cell is prokaryotic which basically means an animal cell has a nucleus and a red blood cell doesnt but it sounds really smart :D. chips Â· 7 years ago.