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Bio 150: Jan 25 & 27

by: Savanna Bashore

Bio 150: Jan 25 & 27 BIO 150

Savanna Bashore

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Lecture notes from classes on January 25 and 27.
Principles of Cellular and Molecular Biology
Brian O'Neill
Class Notes
Biology, molecular biology
25 ?




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This 2 page Class Notes was uploaded by Savanna Bashore on Sunday January 31, 2016. The Class Notes belongs to BIO 150 at University of Tennessee - Knoxville taught by Brian O'Neill in Winter 2016. Since its upload, it has received 14 views. For similar materials see Principles of Cellular and Molecular Biology in Biology at University of Tennessee - Knoxville.


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Date Created: 01/31/16
Biology 150 1/25/16 5 Big Ideas to be discussed 1. Evolution 2. Structure and function 3. Information flow and storage 4. Transformations of energy and matter  5. Systems “Tree of Life” – family tree of organisms that describe the relationships between  genes among species, ancestral species will be found at the base “Phylogeny” – Actual relationships between genes of all organisms “Phylogenetic Tree” – used to show the relationships between species; shared  branched indicate closely related species and vice versa for non closely related  species “Ecology” – study of how organisms interact with one another and their  environment; understanding the distribution and abundance of organisms and  how that effects the environment Levels of Ecological study include… 1. Organisms 2. Populations 3. Communities 4. Ecosystems 5. Global study “Organismal” – study explores morphological, physiological, and behavioral  adaptations of organisms that allow species to thrive in a specific environment “Population” – focuses on study of how the numbers of individuals in a population change over time “Community” – study of nature and consequences of the interactions between  species and the repercussions of those interactions “Ecosystem” – studies how nutrients and the surrounding environmental aspects, also energy, interact with and affect surrounding organisms “Global” – (growing field of study) Quantifies the effects of human impacts on the  biosphere Biodiversity What is biodiversity? – can be described as the tree of life, branches are the  lineages of organisms living today; tips are all existing species As biodiversity increases, branches and tips are added to the tree, and vice  versa for extinctions Biodiversity is analyzed at a genetic, species, and ecosystem  “Genetic Diversity” – total genetic information contained within all  individuals of a species “Species Diversity” – the variety of life forms on earth measured as the number  and relative frequency of species in a particular region Does biodiversity lead to stability? – stability of community refers to ability to… a. Endure disturbance without changing b. Recover to formal levels of productivity or species c. Maintain productivity and other aspects of ecosystem functions as  conditions change overtime “Resistance” – measure of how much a community recovers after  disturbance “Resilience” – measure of how quickly a community recovers following a  disturbance  An increase in species richness = an increase in services provided by the  ecosystem  Ecosystems are simplified by extinction – productivity might decrease


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