how many legs of a centipede. Are the number of legs for a crab is always constant?
156461
>>>>how many legs of a centipede. \n\nI think you meant to ask "How many legs HAS a centipede?". Actually given your grasp of grammar you probably meant to ask "How many legs does a centipede have?".\n\n\nThe answer is that it varies, anywhere from eight to over a hundred depending on the species.\n\n>>>>>>>Are the number of legs for a crab is always constant?\n\nI think you meant to ask "Are the number of legs for a crab always constant" or "Is the number of legs for a crab always constant".\n\nThe answer is that, barring accidental amputation, all ADULT crabs have 10 legs. Many people believe they have 8 legs, but crabs also have a pair of swimming legs that they keep tucked against the body when they are on land.\n\nJuvenile crabs can have just 6 legs.
1023036
eight. octa= eight (ex: octopus- eight legs, octagon- eight sides)
457652
Nothing special about five, it could have been four or six.  But what is amazing is that almost all four-limbed creatures have five digits on each limb.  (This is called 'pentadactyly', by the way.)  This includes primates, dogs, cats (don't forget the dew claw), wings of bats and birds, crocodiles, even whales(!).   Even horses hooves develop from one of five toes in the embryonic horse.\n\nWhy is this?  Because all four-limbed creatures developed from the same five-toed ancestor.  Yet another little piece of evidence for evolution to add to the pile.\n\nOh, one other little tidbit ... it's because we have 10 fingers that we developed a base-10 numbering system (that's why we call the 10 symbols we use in our system 'digits' (fingers), and where we get the word 'digital').
679868
decapod\n\nlobsters, crabs.....
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Centipedes (Class Chilopoda) are fast-moving venomous, predatory terrestrial arthropods that have long bodies and many jointed legs. Chiefly nocturnal, centipedes are found primarily in tropical climates but are also widely distributed in temperate zones. Some species are highly venomous with extremely toxic venom on their claws which can cause death in humans.\n\nAs in the closely-related millipedes, they are highly segmented (15 to 173 segments), but with only one pair of walking legs per segment. Centipedes are dorso-ventrally flattened, and are among the fastest and most agile of arthropod predators.\n\n \nNote that the claw arises from the first thoracic segmentThe head of a centipede has a pair of antennae and jaw-like mandibles, and other mouthparts that evolved from modified appendages. The most anterior trunk segment of a centipede has a pair of venomous claws (called maxillipeds) that are used for both defense and for capturing and paralyzing prey. Despite their name, which stems from the Latin words 'centum' (meaning 'hundred') and 'ped' (meaning 'foot'), they normally have around half that number of legs, though it is possible to find centipedes with over 200 legs.\n\nThe house centipede (Scutigera coleoptrata) is a fast-moving carnivore that feeds on insects such as cockroaches and other small invertebrates.
712858
I like a very broad question.  Arachnids and crustaceans both shed exoskeletons as they grow.  The arachnids are generally land creatures comprising of spiders, scorpions etc.  Crustaceans comprise of crabs, shrimp, prawns, crayfish, lobster etc.  There are a number of crustaceans that live on land but require water to breed.  The land crab is an example of one.  They also need to shed exoskeletons.\nExoskeletons are what holds there bodies together as they have no internal skeletons.  So as the animal grows, the skin needs to be shed.\nThe arachnid need little water, gathering what they need from the animals that they eat.  The exoskeleton also reduces water lose for those that live in deserts.\nCrustaceans have evolved to live in both fresh and salt water, so the adaptations are to numerous to list.  I hope I have given you a few clues for further investigation.
575699
Insects do not have an internal skeletal system, they have exoskeletons.  So all insects are invertibrates.
222438
This is a very interesting question!  Many famous evolutionary biologists have had cracks at answering similar questions.  The basic idea is that over the course of evolution - from ancient fish to ancient amphibians to ancient tetrapods - there were constraints in the development of the body plans to make a pelvis for holding the hindlimbs and a shoulder girdle for holding the forelimbs.  For physical reasons these two morphological features have not evolved in other locations along the body, because of this, tetrapods have only four legs.
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Not to mention the fact that it says that insects only have four legs too.
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Centipedes and Millipedes\n\n\n\nCentipedes have long, flattened, and segmented bodies. \n\nEach segment has one pair of legs. \n\nThe number of body segments can vary from 15 to 181. \n\nThey have three pairs of mouthparts and the venom fangs are on the first segment. \n\nMillipedes have two pairs of legs per segment and have cylindrical bodies, rather than the flattened bodies of centipedes. \nMillipedes do not bite. \n\nHowever, millipedes have glands on the sides of their bodies which can secrete a brown or white liquid that smells like iodine. \n\nIf a millipede is handled or crushed, this liquid can cause redness, burning and a rash.\n\n If the fluid is rubbed into the eyes, significant eye irritation will result. Wash immediately after handling. \n\nAlthough there are some dangerous centipedes, they are not native to California. \n\nMost of the venomous centipedes live in Japan. \n\nThe venomous centipedes in the United States are found in the desert of the Southwest, especially in Arizona. \n\nA bite from a California centipede may cause immediate burning pain, redness and swelling. \n\nThe clawed tips of the feet may cause puncture wounds that can become infected.\n\n\nIf breathing difficulties, difficult swallowing and/or body-wide itching develop, the patient is having a severe allergic reaction. Immediately \n\ncall 9-1-1 for assistance.\n\n\n\n Otherwise, wash the bite or sting area well with soap and water to help prevent infection. \nIf stung or bitten on fingers or hand, remove any rings or jewelry in case of swelling. Your local pharmacist can help you select the best over-the-counter medications to help treat insect and spider bites.
587225
Spiders!!!!  How can anything have 8 legs when 6 is enough???
331536
it depends on the number of body segments, centipedes have 1 pair of legs on each segment, so a centipede with 10 body segments has 20 legs. Millipedes have 2 pairs of legs on each segment.
318234
Daddy Long Legs is a type of spider. Spiders are not classified as insects. All healthy, uninjured, sexually matured insects have six legs. Spiders have eight and are classified under 'arachnid'.
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this question rules\n\nregarding your question 2 weeks ago about insects,  i thought of an answer last night,\n\n\nis it a 21st century classification\n\ncan there be more than one classification system\n\nand thus the leviticus quote on insects and four legs isnt really relevant if they had a different classification system
260062
Ants, like all insects, have 6 legs. Arachnids, such as spiders, have 8 legs.
411851
well, it definitely sounds like an arthropod, so the place to look would be a book or website with lots of pictures of different kinds of Arthropods - crustaceans, spiders, centipedes, insects, and more, they're all in the phylum Arthropoda.  Your arthropod sounds like it's in one of the lesser known groups.
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Approx 6 to 7 years. \n(approx 2 months per leg)\n\nIt's sometimes called the French name millepattes(thousand-leg). \n\nIn reality, the fellow has only 42 legs ;)