Why is a starfish an echinoderm?

What is a name of a ground dwelling caterpillar? What animals do not have vertebrates? What type of asexual reproduction does spider plant have? What is another name for a firefly? What makes bumblebees die for no apparent reason HELP? What is released from ruminants and termites? Do grasshopper give off a scent or liquid? How are octopus babies born? What animal lays the egg that a caterpillar comes from? How many muscles does a snail have? Can spider kill people? Why has the praying mantis only got one ear? What organs do insects and fish have instead of lungs? Are roaches attracted to color? Is a velvet worm a decomposer? What will happen when you water a plant with a liquid other than water? Can you still wear clothes after you get bug poison on them? Do cockroaches like hot or cold weather? What symbiotic is scale worm and seastar? How can you tell if a silkworm is male or female?