641An octopus is a notable marine invertebrate that is generally reported to have how many hearts?
642A typical adult insect generally has how many legs?
643A typical spider generally has how many legs?
644Spiders, scorpions, and ticks are grouped together within which class of arthropods?
645Bees, ants, and butterflies are all classified within which large animal phylum?
646Butterflies and many other insects undergo a dramatic transformation in body form known as what?
647The complete metamorphosis life cycle of many insects generally proceeds through egg, larva, pupa, and which final stage?
648Despite common misconceptions, spiders are technically not classified as insects mainly because of what difference?
649Animals whose body temperature varies with their surroundings are generally described as what?
650Animals that maintain a constant internal body temperature regardless of their surroundings are generally described as what?
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