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(and no, it's not just because I haven't received a call since the year 2000)

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Not sure whether to flair as physics, biology or other

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I think this is the right subreddit for a quick question. I can't find a straight, definitive answer online. Anyone know? Do they secret some sort of dissolving agent? They can't phagocytize them as they are too big, so how do they combat multicellular organisms as mere single cells?

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