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.
There are four different types of jellyfish that are categorised by their shape and the way in which they behave. Despite the name, jellyfish are not actually fish but are instead classed in a group of their own as they are unlike any other animal on Earth.The body of the jellyfish is made up of a non-living jellylike substance called mesoglea. This jelly is surrounded by a layer of skin that is just one cell thick.he jellyfish use their tentacles to both catch and sting their prey. The tentacles of the jellyfish are covered in a skin that contains special cells, some that sting, some that grip and some that stick.