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ELS
Test 4
16
Science
Undergraduate 3
10/28/2013

Additional Science Flashcards

 


 

Cards

Term
Evolution
Definition
-Change of allele frequencies in a population over time
Term
Natural Selection
Definition
-The process by which evolution occurs
Term
Population
Definition
-Group of interbreeding organisms at the same time and place
-Evolution does not occur at the individual level!!!
Term
Charles Darwin
Definition
-Influenced by others
-Combined travel & OBSERVATION
Term
Muataion
Definition
-Change in DNA
-Caused by mutagens or random
Term
Genetic Drift
Definition
-Random changes in allele frequency
Term
Migration
Definition
-Sharing of genetic information
-Essential to diversity
Term
Rules for Natural Selection
Definition
1. Variation for a trait
2. Variation must be inheritable
3. Differential reproductive success
Species produce excess numbers
Competition
Some are more successful or FIT
Term
ADAPTATION
Definition
-Features of organisms that allow them better survival
Term
Directional Selection
Definition
-Producing cows with higher milk production
Term
Stabilizing
Definition
-Human birth weight
Term
Disruptive
Definition
-Selective pressure on fish
Term
Radiometric Dating
Definition
-Evaluate amount of certain radioactive isotopes present in fossils
Term
Pangaea
Definition
-broke apart in Mesozoic era
Term
Biogeography
Definition
-Distribution patterns of living organisms
Term
Vestigial Structures
Definition
-Eye sockets with no eyes in cave fish
-Molars in vampire bats
-Pelvic bones in whales and pythons
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