What fossil evidence best supports the classification of animals into these two basic branches, still recognized today?
a) fossilized amniotic eggs
b) impressions of scales versus fur
c) evidence of exoskeletons and endoskeletons
d) fossilized bones with and without air cavities

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

request for reexamination