I THINK it is xylem because water and minerals pass through it. I hope this helps.
That would be Artificial Selection.
Answer:
The answer is Transpiration.
Answer: The number of electrons in an atom's outermost valence shell governs its bonding behaviour. Elements whose atoms have the same number of valence electrons are grouped together in the Periodic Table. ... Nonmetals tend to attract additional valence electrons to form either ionic or covalent bonds.