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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
The way the bowl is shaped, they can not escape without turning upside-down, causing them to fall back down into the bowl. Fire ants are the exception to this rule, though, as their saliva contains a very sticky acid and they lick their feet and can occasionally walk upside-down.
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