The answer is an overhunting.
<span>The bottleneck event means drastic reduction of the population size because of environment changes. The consequence of this is the reduction of genetic variation. The bison population is a good example of the population bottleneck. The bison population drastically reduced its size due to overhunting which culminated at the end of the 19th century, when bisons almost extinct. </span>
Including DNA ATP, & many identical or nearly identical enzymes.
Cytosine, thiamine, uracil are prima de bases. ade dune and guanche are purine bases.
What ^ he/she said! Hope you have a good day :)