AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

Biology Flashcards

Terms : Hide Images
14638516757Adaptationinherited characteristic that increases an organism's chance of survival0
14638520243analogous structuresstructures that do not have a common evolutionary origin but are similar in function1
14638627482ancestora person that someone is descended from2
14642403391behaviorthe way in which animal responds to an external or internal stimulus3
14642414696Biodiversitynumber of different species living in an specific area4
14642421848Cladograma branching diagram that represents phylogeny or evolution of a species or group.5
14642435069diversity(n.) difference, variety; a condition of having many different types of forms6
14642439166gene poolAll the genes, including all the different alleles for each gene, that are present in a population at any one time7
14642443293genetic driftrandom change in allele frequencies that occurs in small populations8
14642448309bottleneck effectGenetic drift resulting from the reduction of a population, typically by a natural disaster, such that the surviving population is no longer genetically representative of the original population.9
14642464770founder effectGenetic drift that occurs when a few individuals become isolated from a larger population and form a new population whose gene pool composition is not reflective of that of the original population.10
14642470201Georgraphic Isolationform of reproductive isolation where populations are separated physically by geographical barriers11
14642473497gene flowMovement of alleles into or out of a population due to the migration of individuals to or from the population12
14642478953Hardy-Weinberg Principlewhen allelic frequencies remain constant, a population is in genetic equilibrium13
14642488382natural selectionthe theory of evolution by Darwin, that among the range of inherited trait variations, those contributing to reproduction and survival will most likely be passed on to succeeding generations14
14642500158PhylogenyEvolutionary history of a species15
14642508208habitatthe natural home or environment of an animal, plant, or other organism.16
14642510901Niche(ecology) the role or position of an organism within its environment and community (affecting its survival as a species)17
14642518979Speciationthe evolution of new species18
14642521012stabilizing selectionmost common form of natural selection in which organisms with extreme expressions of a trait are removed19
14642525099distruptive selectionprocess in which individuals with average traits are removed, creating two populations with extreme traits20
14642528803directional selectionshift of a population toward an extreme version of a beneficial trait21
14642533304fossil recordChronological collection of life's remains in sedimentary rock layers22
14642543859Embryologystudy of embryos and their development23
14642548103homologous structuresstructures that are similar in different species of common ancestry24
14642553172behavioral isolationIsolation caused by differences in courtship or mating behaviors25
14642561601reproductive isolationseparation of a species or population so that they no longer interbreed and evolve into two separate species26
14642566876TheoryA hypothesis that has been tested with a significant amount of data27
14642567727SpeciesA group of similar organisms that can breed and produce fertile offspring.28
14642571096Populationgroup of individuals of the same species that live in the same area29
14642574266mimicrymorphological adaptation in which one species evolves to resemble another species for protection or other advantages30
14642579391camoflaugeAn adaptation that allows an organism to blend in with its environment31
14642583675convergent evolutionProcess by which unrelated organisms independently evolve similarities when adapting to similar environments32
14642586884divergent evolutionwhen two or more species sharing a common ancestor become more different over time33
14642587581adaptive radiationdiversification of a species into a number of different species, often over a relatively short time span34
14649036654Coevolutionprocess in which two or more species evolve in response to changes in each other35
14649039080punctuated equilibriumPattern of evolution in which long stable periods are interrupted by brief periods of more rapid change36
14649046348Biological ResistanceThe natural or genetic ability of an organism to avoid or repel attack by biotic agents37

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!