AP BIOLOGY

Detailed explanation-1: -The phylum Arthropoda contains a wide diversity of animals with hard exoskeletons and jointed appendages. Many familiar species belong to the phylum Arthropoda-insects, spiders, scorpions, centipedes, and millipedes on land; crabs, crayfish, shrimp, lobsters, and barnacles in water (Fig. 3.72).

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: -Among these, the most diverse invertebrate phylum is Arthropoda, which contains ∼1.11 million described species (Figure 1). Roughly 85% of arthropods are insects, and this phylum also includes arachnids, crustaceans, and myriapods (Figure 1).

Detailed explanation-4: -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-5: -Phylum Arthropoda is the most speciose clade in the animal world (Table), and insects form the single largest class within this phylum.