Study your flashcards anywhere!

Download the official Cram app for free >

  • 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

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

26 Cards in this Set

  • Front
  • Back
Modern Synthesis
A comprehensive theory of evolution emphasizing populations as units of evolution, using ideas from genetics, statistics, paleontology, taxonomy, and biogeography.
Gene pool:
The aggregate of the different forms of genes (alleles) in an entire population
small scale changes in allele frequencies brought about by mutation, natural selection, gene flow, and genetic drift.
Balanced polymorphism
ability of natural selection to maintain diversity in a population. When N.S. maintains stable frequencies of two or more phenotypic forms in a pop. (heterozygote advantage)
Evolutionary change above the species level including appearance of major evolutionary changes like flight that we use to define higher taxa.
: Gradual change from one species to another
Splitting of a gene pool into two or more separate gene pools, each giving rise to new species. Promotes diversity.
Isolating mechanisms
Pre zygotic: habitat, temporal, behavior, mechanical, gametic (sperm is transferred but egg is not fertilized gametes die or gametes are incompatible.)
Post zygotic: zygotic mortality- egg is fertilized, but embryo dies. Hybrid inviability- hybrid forms but shows low signs of fitness. Hybrid infertility- hybrid is sterile or partially so.
Allopatric speciation
: physical barrier prevents gene flow between populations, reproductive isolation mechanisms arise.
The evolutionary history of a species
analytical study of diversity and relationships of organisms.
Field of bio concerned with classifying, naming, and identifying species. Binomial system is now used originally by Linneaus.
pre monkeys- lemurs, lorises, tarsiers
monkeys, apes and humans
: apes and humans
fossils that are homonids are those on the twig that branched of from the chimps and are more closely related to use than any living species. (Australopithecus and homo)
split from great apes of Africa 5-7mya. Bipedal, 450cc brains.
: places social behavior in evolutionary context.
Study of factors that contribute to growth or decline of population. Study of vital statistics that impact population size. Birth and immigration, death and emigration.
Life table
Age specific summary of survival pattern of a population.
Life Histories
: the traits that affect an organisms schedule of reproduction and survival make up its life history
an ecological relationship between organisms of two different species that live together in direct contact.
Biological diversity across all scales from genes to landscapes.
natural selection
ob. individual variation.
ob. overproduction and competition
inf. unequal reproductive success
inf. evolutionary adaptation
all the changes that have transformed life on earth from its earliest beginnings to the diversity that characterizes it today
ecological succession
transition in the species composition of a biological community, often following ecological disturbance of the community . the establishment of a biological community in an area virtually barren of life.