Which of the following is not true regarding arthropods?

W) Arthropods have an open circulatory system

X) Molting occurs because arthropods cannot grow without shedding their exoskeleton

Y) Book lungs are found in arachnids

Z) Cheliceriformes [kuh-liss-er-uh-forms] are characterized by 5 pairs of legs and two pairs of antennae
Z) CHELICERiformes ARE CHARACTERIZED BY 5 PAIRS OF LEGS AND TWO PAIRS OF ANTENNAE