In animal classification, ticks and mites belong to which major group of arthropods?

Introduction / Context:
Arthropods include insects, spiders, crabs and many other animals with jointed legs and exoskeletons. Within Arthropoda, there are several classes such as Insecta and Arachnida. This question asks where ticks and mites fit in this classification, which is a common point of confusion.

Given Data / Assumptions:

• The animals in question are ticks and mites.
• All listed options are major groups of invertebrates.
• We assume a school level understanding of arthropod groups.

Concept / Approach:
Ticks and mites are small arthropods that usually have four pairs of legs as adults and do not have antennae or wings. These are key traits of arachnids, the group that also includes spiders and scorpions. Insects, in contrast, have three pairs of legs and usually one or two pairs of wings. Myriapods include centipedes and millipedes, and crustaceans include crabs and shrimps. Therefore, ticks and mites belong to Arachnida and are correctly described as arachnids.

Step-by-Step Solution:
Step 1: Recall the basic features of arachnids, especially eight legs and absence of antennae. Step 2: Remember that ticks and mites resemble tiny spiders and share similar body plans. Step 3: Match these characteristics with the options and identify arachnids as the correct group. Step 4: Confirm that insects have six legs and myriapods have many legs, which does not fit ticks and mites.

Verification / Alternative check:
Look at any biology textbook classification table. Ticks and mites are placed in the class Arachnida along with spiders and scorpions. This classification agrees with their body structure and life cycle. This independent reference confirms that arachnids is the correct answer.

Why Other Options Are Wrong:
Option B, insects, have three pairs of legs and often wings, which does not match ticks and mites. Option C, myriapods, include centipedes and millipedes with many body segments and numerous legs. Option D, crustaceans, live mainly in aquatic environments and have two pairs of antennae and a different body plan. Option E, annelids, are segmented worms without jointed legs or exoskeleton.

Common Pitfalls:
Because ticks and mites are small, some students mistakenly think they are insects. Always count the legs and look for antennae. Eight legs and no antennae point to arachnids. Six legs and one pair of antennae indicate insects. Using these simple visual checks helps avoid misclassification.

Final Answer:
Ticks and mites belong to the group called Arachnids.