How does the form ft function in the crayfish appendages?

Is a dragonfly harmful or helpful? What does a molluscs mean? Is the following sentence true or false Earth's worms do most of the work of mixing human with other materials and soil? Why is an inch worm called that name? What animals dig holes in backyard? How do you kill ants in microwave? Does dragonfly have the same number of legs as butterfly? Why are bed bugs most active at dawn? How do hornets protect themselves? Is there a place to buy Caterpillar Hats? How often you should treat for fleas? What color light bulb to use to repel spiders? What is the name of a baby butterfly? What is the process by which a species becomes better suited to its environment called? How much does it cost to make chicken tenders? Is larvae a plural or singular? How can atis leaves make a lotion as mosquito repellent? Will boiling water take out clorine? A long thin tube in butterflies and mosquitoes? What snail eats mussels?