Chp. 1-4 Outline

Chp. 1-4 Outline - Week 1 Chapters 1-4 Chapter 1 Exploring...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Week 1: Chapters 1-4 Chapter 1: Exploring Life Biology : the scientific study of life Hierarchy of Biological Organization: 1. Biosphere 2. Ecosystem 3. Communities 4. Populations 5. Organisms 6. Organs and organ systems 7. Tissues 8. Cells 9. Organelles 10. Molecules The Study of Biology: Reductionism: reducing complex systems into simpler components that are more manageable to study. Systems Biology : an approach to studying biology that aims to model the dynamic behavior of whole biological systems, allows biologist to predict how a change in one or variables will impact other components. Eukaryotic vs. Prokaryotic cells A eukaryotic cell is subdivided by internal membranes into various membrane- enclosed organelles, and contains a membrane-enclosed nucleus. (Organisms that have eukaryotic cells include: plants, fungi, and animals.) Prokaryotic cells lack membrane-enclosed organelles and a membrane enclosed nucleus. (All bacteria are composed of prokaryotic cells.) In prokaryotic cells, DNA is not separated from the rest of the cell by enclosure in a membrane-bounded nucleus. Negative & Positive Feedback Loops:
Image of page 1

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

View Full Document Right Arrow Icon
Negative feedback loops are the most common form of regulation, it consists of a process which seeks to oppose a change or fluctuation and thereby seeks to maintain homeostasis. In contrast, positive feedback loops consist of a control mechanism in which a change in some variable triggers mechanisms that amplify the change, meaning that the change continues in the same direction and defers further from homeostasis. Domains : There are three domains, bacteria, archaea and, eukarya. 1.Domain 2. Kingdom 3. Phylum 4. Class 5. Order 6. Family 7. Genus 8. Species ( D o Kings P lay C hess O n F ine G rain S and) Darwin, Survival of the Fittest: Descent with modification. Natural selection as a mechanism of evolutionary adaptation. Natural selection is the evolutionary process that occurs when a population’s heritable variations are exposed to environmental factors that favor the reproductive success of some individuals in a population more than others. Chapter 2: The Chemical Context of Life Matter : anything that takes up space and has mass Element : a substance that cannot be broken down to other substances by chemical reactions. Compound : a substance consisting of two or more different elements combined in a fixed ratio. Trace elements : Elements required by an organism in only minute amounts. Atom: Is the smallest unit of matter that still retains the properties of an element. Neutrons, protons, and electrons are subatomic particles, with neutral, positive, and negative charges respectively.
Image of page 2
Atomic Number : The number of protons in an element, the atomic number is unique to each specific element (atom).
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
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