AP BIOLOGY

Detailed explanation-1: -Insects are the most diverse members of the subphylum Hexapoda (Fig. 3.77). Hexapods have a distinct body plan, which includes three large sections: a head, thorax, abdomen with three pairs of thoracic legs and one pair of antennae (Fig. 3.75 B).

Detailed explanation-2: -Answer and Explanation: Insects are the most diverse of the five classes of arthropods. Insects are the most diverse because they have been on the Earth longer than other arthropods and had time to develop and evolve in their biodiversity.

Detailed explanation-3: -The incredible diversity and success of the arthropods is because of their very adaptable body plan. The evolution of many types of appendages-antennae, claws, wings, and mouthparts-allowed arthropods to occupy nearly every niche and habitat on earth.

Detailed explanation-4: -Phylum Arthropoda is the most speciose clade in the animal world (Table), and insects form the single largest class within this phylum.

Detailed explanation-5: -Therefore, the greatest diversity is found in the Arthropoda phylum. Additional Information: Arthropods are distinguished by their jointed limbs and cuticles made of chitin, mostly mineralized with calcium carbonate. The body plan for the arthropod consists of segments, each with a pair of appendages.