Florida Public Health Practice Exam 2025 – Complete Prep Resource

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What is a characteristic feature of insects within the Phylum Arthropoda?

They have soft bodies and no internal skeletons

They possess a hard exoskeleton and jointed legs

Insects belonging to the Phylum Arthropoda are characterized by having a hard exoskeleton and jointed legs. The exoskeleton, which is primarily made of chitin, provides structural support and protection to the insect's body, helping to prevent desiccation and allowing for various adaptations in different environments. This hard exoskeleton sets arthropods apart from organisms that have soft bodies, as is the case with some other animal phyla.

Additionally, jointed legs are a defining characteristic that enables insects to have a wide range of motion and adaptability, allowing them to navigate various environments, find food, and evade predators. These features are crucial for their survival and are common across most arthropods. The combination of these attributes contributes significantly to the success and diversity of insects within this phylum.

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They are primarily aquatic and have gills

They lack a structured body plan

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