Arthropods

This depends on the type of arthropod, but most do not. Most arthropods never migrate further than 200 feet from their place of birth.

it grow a new exoskeleton

Bilateral, meaning left and right are equal.

The most obvious answer is the Chilopoda, the centipedes. The Diplopoda or millipedes seem to have two pairs of legs per segment, though actually that is because their real segments are joined in twos so that what looks like one segment really is a double segment and therefore bears four legs.

Yes, arthropods have to moult in order to increase in size, because their exoskeleton is rigid and inhibits growth. The process is called ecdysis and is not limited only to arthropods; it is a characteristic of their clade, ecdysozoa, which includes nematodes and other phyla. Arthropods are more vulnerable when moulting because their new exoskeleton is soft and therefore more vulnerable to predators. The new exoskeleton takes a while to harden; many will hide and wait during this time. Arthropods will usually moult multiple times during their lifespan; the process is also associated with lost limb regrowth.

Three body parts{segments } of Arthropods are head , thorax and abdomen .Technically these are called tagma and they are made up of segments .

Arthropod exoskeletons are naturally hard because of the composition of the protein used (a chitin composite); crustaceans further harden it using a process called biomineralization.

Chitin chemically is a long-chain polymer, a nitrogenated polysaccharide comparable to cellulose, which allows for hydrogen bonding between polymers for additional strength. By embedding in sclerotin and mineralizing it, arthropods achieve an advantage of gaining a greater toughness and less brittleness than minerals alone but being stiffer and harder than pure chitin.

who care

They use the smaller of the two claws to pick it up.

no they don't

The exoskeleton of arthropoda is made of a tough protein called chitin, a long-chain polymer comparable to cellulose. It fills the same role as the protein keratin in other animals (found in hair, nails, hooves, claws, beaks, etc). Some arthropods, like crustaceans, further harden their exoskeleton by biomineralization with calcium carbonate. Because it is inflexible, the organism has to periodically shed their entire exoskeleton in order to grow.

Insects, arachnids, crustaceans and myriapods have so much in common. They have bodies that are divided into different parts and all of them are invertebrates

They eat leaves.

Well do they

Note that in some texts the subphyla may be referred to as classes; occasionally the taxonomic discipline appears somewhat fluid.

Arthropoda has subphyla Chelicerata, Myriapoda, Crustacea, and Hexapoda. (There is also an extinct class Marrellomorpha and an the extinct Trilobite subphylum). The chelicerata, like spiders, scorpions, mites, etc., get their name from having appendages appear before the mouth; myriapods like centipedes and millipedes characterized by a high count of body segments and legs; crustaceans like crabs, shrimp, woodlice characterized by their biramous (two-part) limbs and a specialized larval form; hexapoda named for their consolidated thorax with only three pairs of legs.

Classes below phylum Arthropoda could be selected from these subphyla; for example classes Arachnida, Chilopoda, Branchiopod, Insecta, and Malacostraca - but there are many more classes.

Moulting - the shedding of the entire outer casing. The arthropod grows a new 'skin' underneath the old one. At the time the old casing is shed, the new one is sof and pliable. It hardens within a few minutes to restore the protection that the 'shell' normally provides.

The dorsal side is its back, and the ventral side is its 'stomach'.

The crayfish is vulnerable on its soft underbelly - the ventral side.

yes they curl up

It's two per segment

Terrestrial biomes

Arthropods live in just about every habitat (if not every habitat) on the earth: Terrestrial which include: desert, forrest, grassland and tundra and Aquatic which include: freshwater and marine,

Jointed limbs are important to arthropods to facilitate survival through mobility, feeding, sensory functions, respiration, etc. The reason for the jointing itself can be attributed to the composition of the exoskeleton (chitin); because of its rigidity, jointing is necessary to provide degrees of freedom for rotation, flexion and extension, etc., to perform physical functions; without jointing, they might be immobile. Other animal phyla might appear to have obviated the use of limbs altogether (like the annelid earthworm) or utilize an unjointed muscular limb (like cephalopod molluscs).

There are several million different types.

Kolihapeltis is a genus of trilobite, an extinct arthropod that lived from the Early Devonian to the Middle Devonian. It's remains have been found in Africa and Europe.

See picture in related link.

pazhuthara chedumbooram

There is such thing as double jointed. The term double jointed is often used to describe someone with hypermobility. This allows the body to move in ways that are usually not normal for most people.