It is believed that this happens because some signals that regulate development are the same between different species and because <span>they share ancient genes. </span>These ancient genes are expressed during a middle "phylotypic stage" of embryonic development for all species.
For example, human and animal embryos go through very similar stages of early development and share similar features such as tails and gill-like structures. The major difference appears to be how long it takes to reach each of these same stages.
<span>The subatomic particles or units inside the cell that is responsible for the potential chemical reactions among chemical species are the electrons. Since they are found outside the nucleus, it is actually easier for them to transfer from one atom to the other. They may be also shared between two compound. </span>
A. X cells I animal cells and Y cells are plant cells
Answer:
I think it's A: Sodium is needed to generate an action potential
