PRIN OF BIOLOGY I
PRIN OF BIOLOGY I BIO 150
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This 4 page Class Notes was uploaded by Retta Mayert on Friday October 23, 2015. The Class Notes belongs to BIO 150 at University of Kentucky taught by Ruth Beattie in Fall. Since its upload, it has received 11 views. For similar materials see /class/228195/bio-150-university-of-kentucky in Biology at University of Kentucky.
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Date Created: 10/23/15
BIO 150 Lecture 3 1252010 35200 AM Several assumptions must be made o Species that lived in the past must be different from the species alive today 0 Change in species over time 0 Connecting forms o The age of the earth must be great possibly millions of years c There must be variations among organisms between species o Natural selection can be operative only if more offspring are born than survive c There must be differences between the offspring that survive and reproduce and those that don t Can amplify or diminish only those traits that are heritable Acquired traits are inheritable Examplesenglish pepper mothdifferent color wings helped for survival Light color picked off tree trunk during industrial revolution dark winged moths survived because they blended in with sot and ash in the air Austrialian rabbits myxomatosis rabbits were introduced to Australia the population exploded the government hired hunters to kill the rabbits but it didn t matter because they reproduce so rapidly The government introduced a disease and 99 of the population died Resistance to drugs MRSA infection that can t easily be treated resistant to normal drug treatment Ethics of artificial selection how far can we take artificial selection Stop at plants Animals Humans How is science done Scientific method way of examining this physical world to discover the lawful relationships that exists 3 requirements Observable with or without equipment Measurable Verifiable testable Method Observation Hypothesis tentative explanation Experiments Conclusion theory A hypothesis can NEVER be proven to be true Experimentation o Use of controls o Variables o Sample size Chemistry structurefunction how is the structure of a molecule related to its function 1252010 35200 AM 1252010 35200 AM
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