Describe the difference between a food chain and a food web.
food chain:

A food web consists of many food chains. 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.

i would have to say autosomal

b.have there own function.