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.
1 Clownfish live in close association with sea creatures called anemones. 2  The anemoneâs stinging tentacles help to keep the clownfish safe from predators. 3  A special mucus on the clownfishâs skin protects it from being stung.4  The particular anemone a clownfish lives with is called its host. Clownfish can scare away predators (preying animals) with pulses of sound made by slamming their teeth together. 2  Clownfish live in close association with sea creatures called anemones. 3  The anemoneâs stinging tentacles help to keep the clownfish safe from predators.