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BIO 181 Week 1 Notes

by: Audrey Notetaker

BIO 181 Week 1 Notes BIO 181

Audrey Notetaker
GPA 3.5

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About this Document

These are the notes from the first week of class. These concepts will be on the exam
Unity of Life 1: Cell Life
Peggy Pollak
Class Notes
Biology, Classification
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This 2 page Class Notes was uploaded by Audrey Notetaker on Wednesday October 12, 2016. The Class Notes belongs to BIO 181 at Northern Arizona University taught by Peggy Pollak in Fall 2016. Since its upload, it has received 2 views. For similar materials see Unity of Life 1: Cell Life in Science at Northern Arizona University.


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Date Created: 10/12/16
Week 1  The traits of life are  1) the organism is made of cell(s)  2) It replicates or reproduces  3) It evolves  4) It contains DNA which transmits genetic information 5) It has to acquire energy in one manner or another The cell theory is  1) Cells come from cells a. They can do that through fission (prokaryotes), mitosis (non­sexual cell), or  meiosis (sexual cell) 2) All organisms are made of cells a. They could be one cell or multi­cellular (more than one cell) 3) The cell is the basic unit of life Some Fancy Terminology  1) Prokaryotes = early life forms. This term is also interchangeable with the term  bacteria. They formed at about 3.5 billion years ago, and have no membrane enclosed  nucleus. 2) Eukaryotes= latter life forms. These dudes can be unicellular (one cell) or multicellular (like us!). They have a membrane bound nucleus and formed 2 billion years after the  prokaryotes.  3) Autotroph= organisms that create their own food by either photosynthesis (changing  light energy to chemical energy) or chemosynthesis. 4) Heterotroph= organisms that cannot create their own food and as such have to eat  other organisms. 5) Taxonomy= The naming of groups (naming of organisms)  Categories of Cell structure Heterotrophic Prokaryote = Bacteria Autotrophic Prokaryote = Monera (Bacteria) Heterotrophic Eukaryote = Animalia (Animals) Autotrophic Eukaryote = Plantae (Plants) Classification of species Current Form of Classification Domain, Kingdom, Phylum/Division, Class, Order, Family, Genus, Species Whittaker’s 5 Kingdoms 1) Plants 2) Animals 3) Fungi 4) Protists 5) Bacteria/Monera Woese’s Domains 1) Archaebacteria (more primitive prokaryotes that can withstand extreme  environments)   2) Eubacteria (all other prokaryotes) 3) Eukaryia (all eukaryotes) Scientific Names Both names are either italicized or underlined Genus name (generic) is capitalized and comes first while the species name is  lowercase and comes after generic name Example: Homo sapiens If you are writing a paper and already spell out the scientific name, you can  abbreviate the genus name Example: H. sapiens


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