How does the form ft function in the crayfish appendages?

Do sea urchins migrate? What sort of caterpillars are these that i have found in my garden They are black with orange strips and are fury Are they harmful as i have many in my garden? Do fireflies live underground during the day? Do flatworms lay eggs? What is a cold water plankton called? What do dunlins eat? Why does garlic repel vampires? How long to gnat bites last? What is 'unknown' in Latin? Do water fleas eat one celled algae? How do you get rid of ground bees in an above ground planter? Does a cat have a radial symmetry? Is a octopus in the phylem chordate? What are the similarities and differences between ants and crickets? Are ticks segmented worms? How do you get roundworms? Does black widow die? What pests affect alfalfa? Who made virus? What does it mean when there is a yellow striped line on the road?