How do you know when a grub is dead?

Is a spider an echinoderm? How do you kill wool worms in sweaters? Why mosquito comes at night but in day time? What insects build nests? What is the thin layer of tissue on a mollusks shell? Where can you find a witchetty grub? One of your snails keeps falling off the side of the tank and doesnt seem to have any grip any ideas why? Can a cockroach live up to a week without its head? Does termite go through complete metamorphosis? Does Delaware have brown recluse spiders? What size round rug should you get for a 60 inch round table? What are three classes of mollusks and an example? Is a daphnia a vertebrate or invertibrate? Why would green June bugs swarm your pasture? What is inside the urn that holds cricket's Ashes? Why do black worms come through the toilet? What is the best synonym for germinate? What do you think might happen to strangler fig seeds that fell into forks in the tree high in the canopy which had very little compost? How do grasshoppers swallow a big prey? What is a mammal that feeds on ants or termites for most if not all of its food?