Question

which of the following is not a characteristic of all specimens of phylum arthropoda?
body divided into head, thorax and abdomen
body divided into cephalothorax, wings and legs
body divided into head, cephalothorax, jointed legs
body divided into wings, head, jointed appendages
i do not know

Explanation:

Arthropods have jointed appendages. Their body segmentation varies: some (like insects) have head - thorax - abdomen; some (like crustaceans) have cephalothorax and abdomen. Wings are not a universal feature (e.g., spiders are arthropods without wings). The option "Body divided into cephalothorax, wings and legs" is incorrect as wings are not present in all arthropods and the body division description is wrong (should be cephalothorax and abdomen in some cases, not with wings as a main division).

Answer:

Body divided into cephalothorax, wings and legs