What I know is that amino acid has side chain, amine groupe ,and groupe of carboxyl so what make them difference is side group where the is 20 different R-group which give each individual characteristics
Where the optic nerve exits the back of the eye
Animal cell is a eukaryotic cell, it contains other membrane-bound organelles, or tiny cellular structures, that carry out specific functions necessary for normal cellular operation in living organisms such as humans and animals . Animal cells contain the following structures and organelles here is the list: Cell (Plasma) Membrane,Centrioles,Cilia and flagella,Cytoplasm,Cytoskeleton,Endoplasmic Reticulum,Golgi Complex, Lysosomes ,Microtubules ,Mitochondria , Nucleus,Peroxisomes & Ribosomes<span> </span>
Direct characterizaation is what the author says about the character.
So B would be correct
