Which of the following is a major principle upon which cell theory is based? a all cells form by free-cell formation. b all cells have dna. c all organisms are made of cells. d all cells are eukaryotic.

ucd e e. rr. t t t t t t. to

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

answer( increase) their individual contractile activity;