Final answer:
Pill bugs have seven pairs of legs, totaling 14 legs. They are crustaceans and not insects, which have six legs. The correct answer is 7 pairs, but since the options are all even numbers, the closest correct choice would be C) 7 pairs if interpreted as the number of pairs.
Step-by-step explanation:
Pill bugs, also known as woodlice, have seven pairs of legs, making for a total of 14 legs. Since the options provided do not include 14 as an answer and instead are all even numbers which would suggest pairs, the correct answer to how many pairs of legs do pill bugs have is C) 7 pairs, as none of the options explicitly matches the correct number of pairs.
Pill bugs are crustaceans and are often mistaken for insects, which have only six legs. Unlike centipedes, which have a varying number of legs but typically around 15 pairs, or millipedes, which have even more, pill bugs have a distinct number that is less than these other myriapods. It's essential to make the distinction between total legs and pairs of legs when discussing the anatomy of arthropods.