試題詳解

複選題
31.(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