Bio Ap evolution essay

Bio Ap evolution essay - Antonio Luo ApBio A The...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Antonio Luo ApBio 4/23/07 A) The nonconstancy of species indicates that individuals are unique. Every individual within a species is genetically different. Every individual's DNA has unique variations. These variations usually show up in the phenotype. No two individuals in a species are alike. For example, half a millimeter's difference in the size of the beak of a finch means the difference between life and death under certain conditions. Branching evolution implies that we all came from one ancestor. The various breeds of dogs all share common ancestry, being all descended from wolves, but were domesticated by humans and then selectively bred in order to enhance various features such as coat color and length or body size. Gradual changes in species happen slowly and over a considerable period of time. When genes mutate, selection occurs, and populations evolve. Because the leaves on the trees that giraffes eat have grown taller and taller over time, so have giraffe’s neck.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern