When referring to a megabyte for disk storage, the hard drive manufacturers use the standard that a megabyte is 1,000,000 bytes. This means that when you buy a 250 Gigabyte Hard drive you will get a total of 250,000,000,000 bytes of available storage.
A food chain only follows just one path as animals find food. eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web shows the many different paths plants and animals are connected. eg: A hawk might also eat a mouse, a squirrel, a frog or some other animal.
All living things need food to have energy which help them to grow and move.A food chain tells how each living thing gets its food and how most of living beings are dependent on each other for their energy requirement.It is also called food web or energy pyramid.A food chain always starts with a producer, which in most of the cases is a plant and it ends with a predator,it is at the top of the food chain.