The more advance the community the more complex the speciess
<span>Enzymes are crucial contributors to protein digestion. Protein-digesting enzymes are referred to as proteinases or proteases. Protein generally takes the form of very complex molecules arranged in chains of amino acids. So the bonds binding these complex molecules together must first be broken down
</span>
E-cool is a bacterium that occurs naturally in the intestines of people and animals
I think [A. <span>evaporation increases the salinity of ocean water], but not sure</span>