What is the resonance structure of this compound?

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.

If energy was included in a chemical reaction, on which side of the equation would it be written for an endothermic reaction?

Which of the following is a reason to make an armature the parent of a creature