2. What structure is found only in molluks?, a. radula, b. shell, c. thorax, d. tube feet, 3. What are the three main body parts of the insects?, a. head,body,thorax, b. head,thorax,abdomen, c. cephalothorax,antennae,wings, d. cephalothorax,wings,legs , 4. Which of the following vertebrates are mammals?, a. bat,whale,goat, b.duck,frog,fish, c. turkey,eagle,owl, d. turtle,snake,cow, 5. Which is not an insect?, a. ant, b. beetle, c. butterfly, d. spider