Which structural hallmark characterizes the Phylum Arthropoda for wolf spiders?
Answer
Exoskeleton made of chitin
Wolf spiders belong to the Phylum Arthropoda, a massive group defined by distinct physical characteristics that are evident in these arachnids. The most hallmark feature is the presence of a tough, external cuticle, which functions as an exoskeleton. This exoskeleton is primarily composed of chitin, providing essential protection and structural support necessary for their terrestrial existence. Additionally, arthropods are characterized by having segmented bodies and jointed appendages, features directly observed in the wolf spider's anatomy, even if segments are sometimes fused.
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