What two atoms form a covalent bond a. a sodium and chlorine atom b. an iron and oxygen atom c. two oxygen atoms d. two sodium atoms apex

i think the miocene epoch spans the time from 23 million to 12 million years ago.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

life would be meaningless without memes

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.