Is iodine a atom, a molecule, an ion or a formule unit?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

How does blood clotting prevent the entry of pathogens through cuts and wounds? answer asap,, this is due tomorrow. will mark as brainliest or whatever you call it : )

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors