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A. Briefly, why couldnt natural selection occur if there was no variation in reproductive output? 8. Octopodes (the theoretically correct pluralization of the word octopus) are highly derived cephalopods. You will learn that they share many features with mammals that they do not share with other invertebrates: highly-developed eyes, a complex brain, and even a closed circulatory system. Based on what you know of the animal phylogeny and evolution from Bio 130, do they share these features because they were present in a common ancestor, or did they evolve independently? Briefly explain your answer
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