What genetic change allowed multicellular animals to come into existence remains obscure.什么样的遗传突变产生了多细胞的动物还不清楚。
Apoptosis is a genetically controlled multicellular organisms process to maintain homeostasis and remove the potentially dangerous cells.细胞凋亡是多细胞生物用来维持细胞恒定性和消除对自体有潜在危险性细胞的保护反应。
