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The arthropod leg is a form of jointed appendage of arthropods, usually used for walking. ... The appendages of arthropods may be either biramous or uniramous. A ...
All arthropod appendages are variations of the same basic structure (homologous), and which structure is produced is controlled by "homeobox" genes. Changes to these genes have allowed scientists to produce animals (chiefly Drosophila melanogaster) with modified appendages, such as legs instead of antennae. [2]
Arthropods (/ ˈ ɑːr θ r ə p ɒ d / ARTH-rə-pod) [24] are invertebrates in the phylum Arthropoda.They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.
The mouthparts of arthropods have evolved into a number of forms, each adapted to a different style or mode of feeding. Most mouthparts represent modified, paired appendages, which in ancestral forms would have appeared more like legs than mouthparts.
The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings.
Newfound fossils of the extinct arthropod Odaraia alata recently provided scientists with a first glimpse of Odaraia’s jawlike structures, called mandibles. These small, paired appendages near ...
Arthropleura was the largest-known land arthropod, a group spanning the likes of insects, spiders, millipedes, centipedes, lobsters and crabs. ... The shape of its feeding appendages and position ...
Some key events in the evolution of the arthropod body resulted from changes in certain Hox genes' DNA sequences. The trunks of arthropods comprise repeated segments, which are typically associated with various structures such as a pair of appendages, apodemes for muscle attachment, ganglia and (at least embryologically) coelomic cavities.