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.
Introduction to aquatic food chains: The components which are involved in the transference of food energy from producers (plants) to the higher consumers (carnivorous animals) in the process of repeated eating and being eaten up is termed as food chain. A food chain is step-wise transfer of energy in the form of food.