AP BIOLOGY

Detailed explanation-1: -Option A: Class Arachnid is a member of the arthropod group that includes spiders, daddy longlegs, scorpions. Arachnids is a group of organisms having jointed appendages. These are invertebrate animals.

Detailed explanation-2: -The arachnids (class Arachnida) are an arthropod group that includes spiders, daddy longlegs, scorpions, mites, and ticks as well as lesser-known subgroups.

Detailed explanation-3: -Myth: “Arachnid” is just a fancy name for spider. Fact: There are eleven orders of arachnids. These include the scorpions; mites and ticks; harvestmen; pseudoscorpions; whipscorpions; solpugids; and spiders.

Detailed explanation-4: -"Arachnid” isn’t just a highfalutin word for spider. Spiders are arachnids, but not all arachnids are spiders. Arachnids are members of a class of animals that includes spiders, scorpions, mites, and ticks. What they all have in common-and what distinguishes them from insects-are four pairs of legs and no antennae.

Detailed explanation-5: -Some well-known types of arachnids (class Arachnida) include spiders, daddy longlegs (harvestmen), scorpions, mites, and ticks.