Which organism has cerebral ganglia in its head connected to ladder-like arrangements of nerve fibers?

How does urea decrease? Which movement causes lunar phases? What light color causes no photosynthesis? What type of genes are considered master switches? Why are polar liquids always attracted towards the charged rod and not repelled? What is a cone shaped mountain formed out of rock thrown up from inside the earth called? What do organisms rely on to get the nitrogen they need? What familyof coumpounds is most likely to be relatively unreactive? Large pacific ocean island it includes Malaysia and brunel? What do ions have that molecules don't? Why doesnt the measles vaccine protect you from all of these disease? What are japans tsunami defenses? Who was the first to show existence of an inheritance molecule? What are the things that are found in Refugio Mbaracay? What was the weather at Appomattox on April 9 1865? What is the word equation for the process that releases energy in cells? What is the average rainfall in the great rift valley? What is electricity produced by moving water? What does the name Mercury mean? What kind of pump is used in waterwall fountain?