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Organic Evolution
SNOW COLLEGE CH 2
20
Anatomy
Undergraduate 1
09/22/2011

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Cards

Term
What is a change in gene frequencies within populations from generation to generation? (HW)
Definition
biological evolution
Term
"Who is the author of the following definition:
“. . . a change in gene frequencies within populations from generation to generation . . . “ (HW)"
Definition
E. O. Wilson
Term
What is E.O. Wilson’s definition of biological evolution? (HW)
Definition
. . . a change in gene frequencies within populations from generation to generation . . .
Term
What is a gene? (HW)
Definition
The fundamental unit of heredity.
Term
What is a population? (HW)
Definition
A group of interbreeding organisms.
Term
Why is it important to understand that populations may change in gene frequencies from generation to generation rather than within a generation? (HW)
Definition
Individuals do not evolve or change genetically, populations do (from generation to generation).
Term
Based on Stephen Jay Gould’s essay “Evolution as Fact and Theory”, what is a fact? (HW)
Definition
"“Facts are the world’s data.”
“ . . . fact does not mean absolute certainty.”
“In science, fact can only mean confirmed to such a degree that it would be perverse to withhold provisional assent.”"
Term
Based on Stephen Jay Gould’s essay “Evolution as Fact and Theory”, what is a theory? (HW)
Definition
“Theories are structures of ideas that explain and interpret facts.”
Term
In his essay “Evolution as Fact and Theory”, Stephen Jay Gould considers organic evolution to be a fact and presents three arguments as to why. What are these arguments? (HW)
Definition
"1. Direct observational evidence.
2. Imperfections in nature.
3. Transition fossils."
Term
What are the four main points of Darwin’s theory of evolution? (HW)
Definition
"1. Heritable variation.
2. Competition.
3. Natural selection.
4. Adaptation & speciation."
Term
Variation is a main point of Darwin’s theory of evolution. Environment may produce variation, as when clones of plants are exposed to different amounts of sunshine. What type of variation is important in organic evolution? (HW)
Definition
heritable (genetic)
Term
Competition between individuals of the same species or different species is an important component of Darwin’s theory of evolution. What is the cause of this competition? (HW)
Definition
"Populations almost always produce more individuals than there are resources to support them. This unlimited ability to reproduce in the face of limited natural resources leads to competition.
Term
What process selects those individuals best suited to survive and reproduce within the environment they inhabit? (HW)
Definition
natural selection
Term
What is simple but effect definition of natural selection? (HW)
Definition
differential reproductive success
Term
At what level does natural selection work (population or individual)? (HW)
Definition
individual
Term
The study guide outlines four main points of Darwin’s theory of evolution. Which of the four was Darwin’s original idea? (HW)
Definition
natural selection
Term
Natural selection leads to changes in the genetic makeup of populations and thus changes in gene frequencies within populations. Which of the four main points in Darwin’s theory refers to this change? (HW)
Definition
adaptation
Term
Individuals do not evolve. Populations do. Why? (HW)
Definition
The genetic makeup of an individual is determined at the moment of conception and does not change through the lifetime of that individual. The genetic makeup of a population may change from generation to generation.
Term
What term refers to the formation of a new species? (HW)
Definition
speciation
Term
What is speciation? (HW)
Definition
the formation of a new species
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