Why hydra has more than one cell?

Bugs that lays eggs under human skin. It starts out a little black pod that burrows in your skin and then a few weeks later a fully formed flying blak beetle bug comes out of your skin. What is this? Why are jellyfish shaped the way they are? Would a spider bite turn hard? What is the centipedes organ for locomotion? What do spiders use to kill or stun their prey? Are sea sponges consumers or producers? How long can bees live after being frozen? Facts about the Bluebottle butterfly? Are sea urchins amphibians? Can el nino de la tierra kill dogs or other animals? What does it mean if there are lots of snails in your yard? What are macroinvertebrates used for? Is there really a color of paint or stain that you can use on ceilings or wood in and around your house that will keep spiders and wasps from making their homes? Do walking sticks have butts? How many different citrus caterpillars are there? Are yellow jacket always short as yellow coats? Do hornets kill other insects? How are insects sensitive? What does a silk farmer do with cocoon not needed for breeding purposes? Do decomposers get all of there energy from the sun?