What is a Bob-a-loop?

What would be would be the least satisfactory organism for genetic research? How can a computer execute 150 billion operations in 15 seconds? Minimum distance below sink to trap? Is it legal to copy the source code of a website? Is there a software that combines the vectoring ability of Inkscape with the 'foldering' and animation ability of Photoshop? What are the disadvantages and advantages of prototyping over system development life cycle? When does a thermostor obey ohm's law? What do you do when your laptop says the following file is missing or corrupt? What stone is the gothic tower made out of? What Services are needed to program in Linux? What are the different types of engineers from a-z. Tellone for each letter and tell what they've inovated or invented? How often are simple machines used? water main installation? How do you write a java program to convert dollars to naira? Is 447 nm blue? What is lookup in hash table? What is time complexity of stack? What are the differences between a schmitt trigger and multivibrator? In some areas of Africa the soil quality is very poor and there is a food shortage. How would technology most likely be useful for this region? Advantages and disadvantages of using employee referral campaign recruitment?