Answer:
Exons because they are coding sequences
Explanation:
The sections of DNA (or RNA) that code for proteins are called exons.
A food web has many different links; It links off into different animals. Where as a food chains just a line of single animals that eat those animals for example: like hawks eat bunnies and bunnies eat grass and grass is the producer.
hope this helps u out...good luck
It affect The survival and extinction of species