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Cnidarians have specialized stinging cells called cnidocytes
Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
Laparoscopy. A lighted endoscope specialized for insertion into the abdomen, called a laparoscope, i
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
Socrates (470–399 B.C.E.) was an Ancient Greek philosopher often called the "father of ...
The nucleus is bounded by a double membrane called the nuclear envelope