Single cells grow and ❌ to form more cells in a process called the ❌.
A ❌ cell undergoes cell division which promotes cell growth. The cells can then either grow into more stem cells or develop into specialized cells which in turn develop into ❌ cells.
❌ development causes many cells to ❌ the ability to divide as they develop into the tissues and organs that make up organisms. The cells that retain many embryonic properties are called ❌ stem cells.
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