| Front | Describe the process of a zygote growing into lots of specialised cells and what state are plant cells in in terms of specialisation |
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| Back | Zygote grows into 8 cells after 3 replication cycles where the resultant mass is totipotent (can turn into any cell), 5 days later the zygote becomes a blastocyst surrounded by a placenta wall with 50 pluripotent (can turn into many cells) cells in the inner cell mass, these stem cells differentiate by changes in gene expression to become specialised - some adult stem cells like neural stem cells (diffentiate into nerve system cells) or white blood stem cells remain multipotent (can turn into some cells) Plant cells are totipotent because they can de-differentiate to form new totipotent stem cells which new plants can grow from |
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