• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

Card Range To Study



Play button


Play button




Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

35 Cards in this Set

  • Front
  • Back
Convergent Evolution
Process by which unrelated organisms independently evolve similarities when adapting to similar environments.
Adaptive Radiation
Process by which a single species or small group of species evolves into several different forms that live in different ways.
Adaptive Radiation
Rapid growth in the diversity of a group of organisms.
process by which two species evolve in response to changes in each other.
Punctuated Equilibrium
Pattern of Evolution in which long stable periods are interrupted by brief periods of more rapid change.
Change in a DNA sequence that affect genetic information.
Gene Pool
Combined genetic information of all the members of a particular population
Relative Frequency
Number of times an allele occurs in a gene pool compared with the number of times other alleles occur.
Single-Gene Trait
Trait controlled by a single gene that has two alleles
Polygenic Trait
Trait controlled by two or more genes
Directional Selection
Form of natural selection in which the curve moves.
Directional Selection
Occurs when individuals at one end of a distribution curve have higher fitness than individuals in the middle or at the other end of the curve.
Stabilizing Selection
Form of natural selection by which the center of the curve remains in its current position.
Stabilizing Selection
Occurs when individuals near a distribution curve have higher fitness than individuals at the other end.
Disruptive Selection
Form of natural selection in which a single curve splits into two
Disruptive Selection
Occurs when individuals at the upper and lower ends of a distribution curve have higher fitness than individuals in the middle
Genetic Drift
Random change in allele frequencies that occurs in small populations
Founder Effect
Change in allele frequencies as a result of the migration of a small subgroup of a population
Hardy-Weinberg Principle
Principle that allele frequencies in a population will remain constant unless one or more factors cause the frequencies to change.
Genetic Equilibrium
Situation in which allele frequencies remain constant.
Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
Well tested explanation that unifies a broad range of observations.
Possible explanation for a set of observations or possible answer to a scientific question.
Preserved remains or evidence of ancient organisms.
The study of the earth, especially the earth's history as recorded in rock.
Artificial Selection
Selection by humans for breeding or useful traits from the natural variation among different organisms
Struggle for existence
Competition among members of a species for food living space, and the other necessities of life.
Ability of an organism to survive and reproduce in its environment
Inherited characteristics that increase an organisms chances of survival.
Survival of the Fittest
Process by which individuals are better than suited to their environment survive and reproduce most successfully; also called natural selection
Descent with modification
Principle that each living species has descended with changes from other species over time
Common descent
Principle that all living things were derived fro common ancestors.
Change in the DNA sequence that affects genetic information
Homologous Structures
Structures that have different mature forms in different organisms but develop from the same embryonic tissues.
Organ that serves no useful function in an organism.