Wyoming Pesticide Applicator Practice Test 2026 – Complete Exam Prep

Question: 1 / 605

Which class of animals lack backbones?

Arthropods

Mammals

Reptiles

Invertebrates

Invertebrates lack backbones, which means they do not have a vertebral column running down their backs. This group includes animals such as insects, worms, and mollusks. Arthropods, on the other hand (option A), are a subgroup of invertebrates that have jointed legs and exoskeletons, such as insects, spiders, and crustaceans. Mammals (option B) and reptiles (option C) are vertebrates, meaning they have backbones.

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