Replies to: What does credit hours mean? A class is usually 3 to 5 credit hours, which roughly refers to the number of hours of lecture per week. For example, a 3-hour class would meet MWF for 50 minutes or TuTh for one hour and 15 minutes. A 5-hour class might meet everyday for 50 minutes, e.g. foreign languages.
The answer is not as complicated as some people may think and yet the method is very effective, even fatal to the predator at times. All jellyfish have tentacles which they use to not only navigate and sometimes swim depending on the species but to also protect themselves from harm.These tentacles are used by the jellyfish to sting those who are preying on them.he answer is not as complicated as some people may think and yet the method is very effective, even fatal to the predator at times. All jellyfish have tentacles which they use to not only navigate and sometimes swim depending on the species but to also protect themselves from harm.
Species of Jellyfish. Most people think that all gelatinous,swimming marine animal encountered at the sea are jellyfish and moreover that they all sting. But not all jellyfish are stinging; many are harmless to humans, but it is always best to avoid touching them.Here is a mini-guide to the main jellyfish species and the most recognizable gelatinous plankton species prevalent in our seas.ost people think that all gelatinous,swimming marine animal encountered at the sea are jellyfish and moreover that they all sting. But not all jellyfish are stinging; many are harmless to humans, but it is always best to avoid touching them.