The principle of defense-in-depth<span> is that layered security mechanisms increase security of the </span>system<span> as a whole. </span>
This would be the answer:
<span>Pepsin digests egg white because it mainly contains protein.</span><span>
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The Dorsal Spines give the fish, "3 Spined Stickleback", because they have hard, spines on their backs. I hope this helps!!!
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Choice B:
More photosynthesis leads to more oxygen in the atmosphere and oceans.
