Question

Crustaceans have

• A. Cephalothorax, one pair of anntennae and chitinous exosekeleton
• B. Cephalothorax and abdomen, two pairs of antennae and biramous appendages
• C. Chitinous, exoskeleton, biramous appendages and well developed lungs
• D. Head and abdomen, one pair of antennae and nauplius larva

Answer 1

The correct option is B Cephalothorax and abdomen, two pairs of antennae and biramous appendages

Crustaceans are the organisms which are included in the arthropods. These organisms have jointed appendages. The group includes crabs, lobsters, etc. The body of crustacean is composed of body segments. The body is divided into three regions as the cephalon or head, thorax and abdomen. The head and thorax are fused together to form a cephalothorax. Each somite or body segment can bear a pair of appendages. In the head region, there are two pairs of antennae, mandibles and maxillae. Crustacean appendages are typically biramous, meaning they are divided into two parts.
Thus, the correct answer is option B.