Which part of the crayfish body is segmented?

• A. The abdomen
• B. The carapace
• C. The antennae
• D. The chelipeds

Answer: (A)

Verified step by step guidance

1. Understand the anatomy of a crayfish: Crayfish are crustaceans with a segmented body divided into three main regions: the cephalothorax, abdomen, and appendages.
2. Focus on the abdomen: The abdomen is the posterior part of the crayfish's body and is composed of distinct, visible segments. These segments are flexible and allow movement, which is crucial for swimming and other activities.
3. Compare the carapace: The carapace is the hard, protective covering over the cephalothorax. It is not segmented but rather a single, continuous structure that shields the internal organs.
4. Examine the antennae: The antennae are sensory appendages located on the head of the crayfish. They are not segmented in the same way as the abdomen but consist of jointed parts for mobility.
5. Analyze the chelipeds: The chelipeds are the large claws used for defense and capturing prey. While they have joints for movement, they are not considered segmented in the same way as the abdomen.