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AP Biology Chapter 17
Simon Kenton
11
Biology
12th Grade
03/11/2012

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Term
Aristotle
Definition

Chain of being

rank organisms from the lowest forms of life, to humans, to spiritual beings

Term
Cuvier
Definition

Theory of Catastrophism

All organisms were created at one time and catastrophies killed many species over time

Term
Lamarack
Definition

Inheritance of Acquired Characteristics

The modifications an organism acquires can be passed on to its offspring

Ex: giraffes neck

Term
Lyell
Definition

Theory of Uniformity

gradual, uniform, repetitive change

Term
Darwin
Definition

Traveled on the Beagle collecting organisms

Developed the theory of evolution

Wrote "Origin of Species"

Term
Natural Selection
Definition
Individuals that are better adapted to their environment survive and reproduce
Term
Directional Selection
Definition
allele frequencies of a variation in phenotypes shift in one direction
Term
Stabilizing Selection
Definition
intermediate (heterozygote) forms of a trait are favored and eliminates individuals that have extreme or unusual traits
Term
Disruptive Selection
Definition
extreme variations are favored and the intermediate forms are selected against
Term
Sexual Selection
Definition
favors a trait that gives the individual a competitive edge in attracting or keeping a mate
Term
Artificial Selection
Definition
selective breeding of plants and animals to encourage the occurrence of desirable traits
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