Draw its molecular shape and determine if each molecule is polar or nonpolar of PO4-3 show work pls

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

Why are people not able to skip a dive to the deepest part of the ocean