<span>If you google your question this comes up - Name the four classes of carbon-containing molecules used by living things, and explain how the nitrogen and carbon cycles contribute to the usable supplies of these macromolecules. The carbon-containing (organic) macromolecules necessary for life are proteins, carbohydrates, lipids and nucleic acids.</span>
Answer:
The organisms have a common ancestor
Explanation:
Homologues structyres conclude that organisms of different species share structures, making them all have some sort of common ancestor
The answer is C, I hope this helped you:)
Answer:
Passive transport must occur to maintain homeostasis. Active transport must occur to get the needed nutrients in and out of the cell.
Explanation:
