Examples of Evolution: Darwin’s Finches


Manage episode 307866168 series 2859788
Player FM과 저희 커뮤니티의 Hopewell Valley Student Publications Network 콘텐츠는 모두 원 저작자에게 속하며 Player FM이 아닌 작가가 저작권을 갖습니다. 오디오는 해당 서버에서 직접 스트리밍 됩니다. 구독 버튼을 눌러 Player FM에서 업데이트 현황을 확인하세요. 혹은 다른 팟캐스트 앱에서 URL을 불러오세요.

My AP Biology Thoughts

Unit 7 Natural Selection

EPISODE TITLE: Unit 7: Darwin’s Finches

Welcome to My AP Biology Thoughts podcast, my name is Shrithik Sekar, Kyle Mason, Gabe Moriello, and I am your host for Unit 7: Examples of Evolution, Darwin’s Finches. In episode 116, we will be discussing this topic and how it relates to the AP Biology Curriculum.

We want to also thank our sources for the information presented in this podcast episode today which include (Britannica, Galapogosisland.org, and Crash course Biology on Youtube). You can find the citations and links to these sources in the show notes.”

Segment 1: Overview of Darwin's finches

What are Darwin's finches?

  • Who is darwin? - Geologist and Biologist, who formed the theory of natural selection. Known for his contributions to Science of evolution. He studied many finches which were found in the galapagos islands located 1,000 km off the coast of Ecuador
  • What were the finches? - These finches were a Group of 18 different species found in the Galapagos island. Darwin found the finches were all closely related with small direct observations that he made during his time in the Galapagos islands
  • What did he study? -During his studies while in the Galapagos islands, he concluded the speciation of the finches which is known as the experiment of Darwin’s finches
  • How does it relate to evolution? - It relates to evolution because it is an example of Direct observation

Segment 2: Evidence that supports Darwin's finches

Connection direct observation evolution

  • What is direct observation of evolution? - Through observation, in small population sizes, it can be found many changes of one species to then create many subspecies. Through direct observation of evidence in almost every species. THis idea had to do with the last universal ancestor, how all species are alike in many ways and all stemmed from the same ancestor. These finches dna is super similar, but these small differences of dna created a difference in appearance which was found ny darwin.
  • ( This begs the question of ) Why are the finches an example of evolution? All 18 species of Darwin’s Finches were originally one finch species on the coast of south america. However, Darwin discovered that this species branched off into 18 different species on the Galapagos islands depending on the finches’ environment
  • What Key pieces of evidence did darwin find? - Darwin found the difference, fruit eating finches had wide beaks, insect eating finches had narrow beaks, and based on different factors of each finches environment each species had a different characteristic change. - GO TO Image

Segment 3: Connection to the Course

The 5 pieces of evidence - of evolution.

How do these ideas of evolution connect to our Biology class?

( Relates to AP bio curriculum 7.2 - Natural Selection)

( 7.4 - Population Genetics

(7.6 - Evidence of evolution

(7.7 - Common Ancestry

  • Direct observation is only one example of evolutionary evidence
  • 5 other examples - Fossils, Geological evidence, Change in DNA, Homologous structures
  • All apart of either natural or physiological selection
  • Natural selection is a part of the 5 fingers of evolution ( Sexual Selection, Genetic Drift, Gene flow, Mutation)
  • Darwin’s finches show that adaptive evolution among the finch populations - the finches evolved different beak types depending on which food they ate, showing how natural selection is a factor in pushing populations to evolve

Thank you for listening to this episode of My AP Biology Thoughts. For more student-ran podcasts and digital content, make sure that you visit www.hvspn.com. Ceeeyaaa!!!!!!

Music Credits:

  • "Ice Flow" Kevin MacLeod (incompetech.com)
  • Licensed under Creative Commons: By Attribution 4.0 License
  • http://creativecommons.org/licenses/by/4.0/

Subscribe to our Podcast


Desmond, A. J. (n.d.). Charles Darwin. Encyclopædia Britannica. Retrieved October 27, 2021, from https://www.britannica.com/biography/Charles-Darwin.

Darwin's finches. Galapagos Conservation Trust. (2019, December 3). Retrieved October 27, 2021, from https://galapagosconservation.org.uk/wildlife/darwins-finches/.

crashcourse. (2012, June 11). Evolution: It's a thing - crash course biology #20. YouTube. Retrieved October 27, 2021, from https://www.youtube.com/watch?v=P3GagfbA2vo.

crashcourse. (2018, October 1). Darwin and natural selection: Crash course history of science #22. YouTube. Retrieved October 27, 2021, from https://www.youtube.com/watch?v=dfsUz2O2jww.

128 에피소드