Trees are awesome so people suck if they cut them down
So we can easily classify animals and distinguish their relationships
Answer:
DNA stores an organism’s genetic code.
Natural selection. The trait that is unfavorable to the baby giraffe's survival will cause the death of giraffes with that specific gene that is responsible for a short neck vs a long neck. Natural selection causes traits that help the survival of the species will be carried throughout generations while unfavorable traits will be lost.
