Asap! will give brainliest:

which prokaryotic organism shows up as the earliest fossils?

a) archaea

b) echinoderms

c) algae

d) cyanobacteria

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