There are 4 electrons altogether shared between carbon atoms in a molecule of C2H4, to be more precise there are 2 electron pairs shared between the carbon atoms.
No todas las bacterias son perjudiciales los lactobacilos son bacterias que ayudan en la digestión
A. Duplication is one of the different types of chromosomal mutations.
Nerve cells release neurotransmitters across gaps and secretion of proteins and wastes: it’s Exocytosis
