bio+sci+94+review+and+worksheets

bio+sci+94+review+and+worksheets - Chapter 1 and 24 The...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1 and 24 The cell theory A cell is defined as a highly organized compartment that is bounded by a thin, flexible structure called a plasma membrane and that contains concentrated chemicals in an aqueous solution. All organisms are made up of cells----a true statement. Where do cells come from? 2 hypothesis: by chance/spontaneously. OR by pre-existing cells Pasteur experiment proofed that the cell come from pre-existing cells. The theory of evolution by natural selection A few problems for you to answer 1. What is natural selection? 2. what are the two conditions that natural selection need to have in order to happen? 3. please state one example about natural selection 4. what is artificial selection? Give me one example ( from the textbook) evolution occurs when heritable variation leads to differential success in reproduction fitness and adaptation fitness means the ability for one to produce offspring and the ones who have higher fitness tend to survive adaptation means that a trait of a species tend to develop in order to fit in a particular environment---peppered moth evolution in London is a very good example for this. Originally the moths are in color peppered and due to the pollution going on in the city, the moth tend to change their color into dark black in order to avoid the predator to find them. You can look it up it is very interesting. Bottom line is: two things to remember 1. the cell is the fundamental unit in ALL organism 2. all species are related by common ancestry and have changed over time in response to natural selection The tree of life rRNA is a large and complex molecule and it made up of 4 different ribonucleotides, which are ___ ___ ____ ____ what are the three domains:
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
what does the tree of life tell you? Based on the sequence below, please draw a phylogenetic tree Species A ----AACTAGCGCGAT Species B----AACTAGCGCCAT Species C----TTCTAGCGGTAT The following information is for you to know about the tree of life in a very specific way: Archaea Domain prokaryotic , no nuclear membrane, distinct biochemistry and RNA markers from eubacteria, possess unique ancient evolutionary history for which they are considered some of the oldest species of organisms on Earth; traditionally classified as archaebacteria; often characterized by living in extreme environments Kingdom Archaebacteria Examples: Methanogens – metabolize hydrogen and carbon dioxide into methane Halophiles – thrive in salt Thermoacidophiles – thrive in acid and high temperatures (up to 110 degrees Celsius) Bacteria Domain prokaryotic
Image of page 2
Image of page 3
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