30 terms

Evolution Vocabulary

Evolution Vocabulary Unit 7 (Chapters 15, 16 and 17)
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Terms in this set (...)

Artificial selection
Selective breeding of domesticated plants and animals
Behavioral Isolation
Isolation between populations due to differences in courtship or mating behavior
Reproductive Isolation
separation of species that prevents them from interbreeding and producing fertile offspring
Convergent evolution
Unrelated species evolve similar adaptive traits ... / \
Directional selection
Natural selection that favors individuals at one end of range
Evolution
Descent with modification; genetic change in species over time
Fitness
Ability of an organism to survive and reproduce in its environment
Fossil
Preserved imprint or remains of a past organism
Convergent Evolution
The evolution of similar features in independent evolutionary lineages.
Gene pool
All the genes in a population at any one time
Genetic drift
A change in the gene pool of population due to chance
Hardy-Weinberg equilibrium
Conditions (5) describing non-evolving population in equilibrium
Homologous structures
Internal body structures with "one form and many functions"
Common Descent
principle that all living things were derived from common ancestors
Theory
A hypothesis that has been tested with a significant amount of data
Half-Life
The time needed for half of a sample of a radioactive substance to undergo radioactive decay
Natural selection
Organisms with certain traits more likely to survive ,reproduce
Radioactive Dating
Process used to date materials (fossils) by measuring the amount of radioactive materials present.
Speciation
An evolutionary process in which one species splits into two or more species.
Relative Frequency
Number of times allele occurs in a gene pool
Relative Dating
Determining the age of an object based upon surrounding fossils and layers they are found in
Darwin
HMS Beagle naturalist; proposed idea of natural selection
Lamarck
Naturalist proposed evolution by use/disuse and acquired traits
Lyell
Wrote "Principles of Geology" suggesting Earth is very old
Mathus
Population would outgrow food supply, poor would suffer if they did not have fewer children
Genetic Equilibrium
condition in which the frequency of alleles in a population remains constant
Adaptation
A feature that allows an organism to better survive in its environment
Adaptive Radiation
Evolution from a common ancestor of many species adapted to diverse environments
Geographic Isolation
the physical separation of populations due to geographic barriers that prevent interbreeding
Hutton
Explained that the earth is millions of years old, major changes are caused by small changes over time

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