Why is echinoderm a good name for this group?

Why were American crop such as wheat and corn susceptible to insect pests? What kind of spider is gray with a dk gray strip on its back? What is the advantage of segmented pricing? How do bees and wasps use their antennae? How is phosphorus used today? Is a praying mantis a pest or helpful? Are inchworms piosoniss? Do people who sleep with there mouth open get spiders in there mouth? Can you get bedbugs from mail order clothing? Characteristics of porifera? What do sandfleas eat? Tiny black brown spotted hard shelled bug? What does a male Indian stick insect look like? What is fuzzy looks like a dragon fly and has a stinger? How much does an exterminator cost to kill fleas? What list of characteristics best describes the eukarta domain? Will baking flour kill snail? What does the praying mantis do after is eats? How do you know which butterfly a caterpillar is going to grow in to? Do the male or female mosquitoes bite or is it both?