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.
They are food for a number of marine animals such as large fish and turtles. Even humans eat jellyfish â yummy! Jellyfish also provide habitat for many juvenile fishes in areas where there are not many places to hide. They can also protect the small fish from being eaten by predators with their stinging cells.