<span>Proteins are different based on number and type of ____________ contained in their polypeptide chain(s)
</span>Amino acids
The answer is two and four hope this helps
I believe it's either genus or species.
How would removing your umbrella in a rainstorm affect your ability to stay dry? The definition of a keystone species is a species that has a crucial role in an ecosystem. Removing one gear from a clock would stop the clock from working. Removing/changing a major contributer to a balance and natural ecosystem can potentially collapse the entire system altogether.
