• 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;

19 Cards in this Set

  • Front
  • Back

Scientific theory

explanation of some aspect of the natural world backed up by a lot of evidence and observation


cumulative change in the heritable characteristics of a population

Cumulative Change

small changes over many generations


Genetic traits that can be passed on


Group of the same species which live in a certain geographical area and have the capability of interbreeding

Homologous structures

structures with similarity which comes from their ancestor

Evidence for Homologous structure

Forelimbs of mammals have same basic skeletal elements even though they're used for different purposes. Evidence that they share same common ancestor.

Adaptive Radiation

species adapt differently than their ancestors into a different species

(species change over time to adapt to environment)

ex.finches beaks adapt based on food

artificial selection

2 individuals intentionally reproduce for their offspring to have certain traits

(giving indvs better chance to survive)

ex.chickens have more meat

fossil record

shows transition from one species to another and origin of features

(visual of certain traits)

ex.mammal jawline but diff types of teeth


a group of organisms that can interbreed and produce fertile offspring

ecological isolation

species mate in different enviornments

temporal isolation

species mate at different times

behavioral isolation

species have different courtship and mating behaviors

mechanical isolation

reproductive parts do not fit together


speciation is a process by which one or more species arise from previously existing species

How speciation occurs

1.populations are isolated somehow

2. natural selection acts on each population independently

3. after a long time, populations are so different they cannot interbreed


inherited characteristics of organisms that enhance their survival and reproduction in specific enviornments

importance of variance within species

tend to survive and reproduce at higher rates other than indvs because of those traits