Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
Answer:
but no the answer is spine which can also be called vertebral column so is B
1. Cell differentiation
2. Cell differentiation
3. Zygote
4. Programmed cell death
5. The cells in between were programmed to die
I hope that this helps you !
