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Imagine: There are at least a few atoms that now make up you, that USED to make up one of the
dinosaurs that lived 65 million years ago! Explain how this could be using the idea that elements were
originally created in the heat and explosion of stars.

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.

Which compound contain an iron with a 3+ charge

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange