Which of the following is not a characteristic of arthropods?

Question

Planktonic or sessile, jointed limbs, well-developed sensory organs, or exoskeletons

 

Answer 1

The characteristics that would not be a characteristic of arthropods would be planktonic or sessile, because planktonic would mean that these organisms float in bodies of water like plankton do. Sessile would imply that the arthropods do not move at all, which we know that they do. They have all other characteristics named here.