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.
A nerve net, which is found in its epidermis, helps jellyfish detect the touch of other animals. Impulses to the nerve cells are sent from nerve rings that have collected information from the environment of the jellyfish through the rhopalial lappet, which is located around the animalâs body.owever, some live in depths of over 12,000 feet. Jellyfish do have symbiotic relationships. For example, some fish are immune to the sting of a jellyfish, so they can take shelter among the jellyfishâs tentacles, thereby baiting trap for other fish. In return, the fish get to share the meal with the jellyfish.