問題詳情
【題組】34.(AB) Not only is the substance biologically expensive, taking weeks to replace, but not having it makes the arachnid even more vulnerable to attack.(AC) If prey or predators make contact, the fish sends the venom through the hollow spines to stab the interloper.(AD) It’s important to note that of the 1,750 scorpion species on Earth, only 25 are lethal to people.(AE) To accomplish this, the wasp must first take control of the host bug’s actions and behaviors—all of which is accomplished by stinging it.(BC) First one shaft goes in and embeds itself there, then the other, “walking” themselves into the skin.(BD) These contain stinging capsules, or nematocysts, with spring-loaded caps.(BE) Zooplankton, a favorite prey, gives off vibrations that trigger the capsules to open, releasing toxin-filled microtubules with a sharp tip that impale and envenomate prey
參考答案
答案：B,C
難度：非常簡單0.909
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用户評論
【不叫賭俠的陳小刀】評論
It’s the only type of bee with double-shafted barbed stingers, which means each shaft has backward-facing hooks that anchor into their target’s skin. First one shaft goes in and embeds itself there, then the other, “walking” themselves into the skin.When the stinger breaks off, so does the venom sac and the musculature that pumps the venom.它是唯一一種帶有雙軸刺刺的蜜蜂，這意味著每個刺刺都有朝後的鉤子，可以固定在目標皮膚上。 第一個軸進入並嵌入其中，然後另一個軸“走進”皮膚。 當毒刺折斷時，毒液囊和泵出毒液的肌肉組織也會折斷。