6 ч 9 янв 2018 г. - cells begin differentiation to become different tissues because it occurs many times during the development of a multicellular organism as the organism changes from a single zygote to a complex system of tissues and cell types.
Добавлено на ленту времени:
Дата:
6 ч 9 янв 2018 г.
Сейчас
~ 7 гг и 9 мес назад