What term describes a tumor that has spread?

Which element provides strength to the exoskeleton of clams and oysters

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.