Alan's Big, Scary Teeth

Alan's Big, Scary TeethBy: Jarvis Illustrator: Jarvis A goofy and lonely denizen of the jungle has just one talent scaring other creatures with his big, scary teeth! What would he do without them? Deep in the jungle lurks Alan the alligator, descended from a long line of very scary alligators. He prepares carefully polishing his scales, brushing each of his big, scary teeth, and practicing his frightening faces then sneaks into the jungle to terrorize the jungle critters.

But is the S

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●DNA是生物的生命設計圖：DNA由兩條長鏈連結而成，扭成像螺旋梯一樣的形狀，兩條長鏈上有互補的基因密碼。讀取基因時，只需要其中一條長鏈上的遺傳訊息。另一條長鏈平時可以做為保護蓋，而且假如有一條鏈的基因受損了，就可以用另一條的互補資訊來恢復基因密碼。而分子結構為什麼像螺旋梯呢？因為長鏈結構連接時會有一個角度，整條長鏈累積下來，直直的梯子就會扭成螺旋狀。