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ap biology - extinction, variation & origins of life

originally streamed on March 18, 2020 with Jessica NadzamTeacher
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Review session covering origins of life theories, genetic variation in populations, and mass extinctions for AP Biology. Learn about early Earth conditions, the RNA world hypothesis, genetic diversity, and the current sixth extinction event. This se ...more

timestamps

  • 0:00

    Welcome and Greetings

  • 0:39

    Teacher Introduction

  • 1:10

    Topic Overview

  • 2:11

    Screen Sharing Setup

  • 3:15

    Fiveable Resources Promotion

  • 5:18

    Origins of Life Introduction

  • 8:25

    Early Earth Conditions

  • 11:02

    Geological Time Scale

  • 13:38

    Stromatolites and Cyanobacteria

  • 16:45

    Photosynthesis and Oxygen

  • 17:16

    Origins Theories Overview

  • 22:23

    Primordial Soup Theory

  • 24:27

    Panspermia Theory

  • 25:00

    Hydrothermal Vents Theory

  • 29:18

    Cambrian Explosion

  • 32:25

    RNA World Hypothesis

  • 34:07

    Variation in Populations

  • 37:48

    Genetic Diversity Importance

  • 40:56

    Extinction Vortex

  • 43:32

    Mass Extinctions History

  • 47:11

    Current Sixth Extinction

  • 48:14

    Q&A Session

  • 55:18

    Closing Remarks

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Resources

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history

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social science

āœŠšŸæ ap african american studiesšŸ—³ļø ap comparative government🚜 ap human geographyšŸ’¶ ap macroeconomicsšŸ¤‘ ap microeconomics🧠 ap psychologyšŸ‘©šŸ¾ā€āš–ļø ap us government

english & capstone

āœšŸ½ ap english languagešŸ“š ap english literaturešŸ” ap researchšŸ’¬ ap seminar

arts

šŸŽØ ap art & designšŸ–¼ļø ap art historyšŸŽµ ap music theory

science

🧬 ap biology🧪 ap chemistryā™»ļø ap environmental sciencešŸŽ” ap physics 1🧲 ap physics 2šŸ’” ap physics c: e&māš™ļø ap physics c: mechanics

math & computer science

🧮 ap calculus abā™¾ļø ap calculus bcšŸ“ ap precalculusšŸ“Š ap statisticsšŸ’» ap computer science aāŒØļø ap computer science p

world languages

šŸ‡ØšŸ‡³ ap chinesešŸ‡«šŸ‡· ap frenchšŸ‡©šŸ‡Ŗ ap germanšŸ‡®šŸ‡¹ ap italianšŸ‡ÆšŸ‡µ ap japanesešŸ›ļø ap latinšŸ‡ŖšŸ‡ø ap spanish languagešŸ’ƒšŸ½ ap spanish literature

career kickstart

šŸ’¼ ap business with personal financešŸ”’ ap cybersecurity

go beyond AP

high school exams

āœļø PSATšŸŽ“ Digital SATšŸŽ’ ACT

honors classes

šŸ¬ honors algebra IIšŸ«€ honors anatomyšŸ‡ honors biologyšŸ‘©šŸ½ā€šŸ”¬ honors chemistryšŸ’² honors economicsšŸ“ honors geometryāš¾ļø honors physicsšŸ“ honors pre-calculusšŸ“Š honors statisticsšŸ—³ļø honors us governmentšŸ‡ŗšŸ‡ø honors us historyšŸŒŽ honors world history

college classes

šŸ‘©šŸ½ā€šŸŽ¤ artsšŸ‘” businessšŸŽ¤ communicationsšŸ—ļø engineeringšŸ““ humanitiesāž— mathšŸ§‘šŸ½ā€šŸ”¬ sciencešŸ’¶ social science

hs classes

šŸ›ļø alabama historyā›°ļø appalachian studies🌓 california historyšŸŒ earth science🌐 ethnic studies🐊 florida historyšŸ‘ georgia historyšŸŒŽ global studies🌺 hawaiian studiesšŸ“° journalism🪶 native american studies🌵 new mexico history🤠 oklahoma historyāš—ļø physical sciencešŸŽ™ļø speech and debatešŸ¤ texas government🤠 texas history🌲 washington state historyšŸ•Šļø world religions
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Ā© 2026 Fiveable Inc. All rights reserved.

APĀ® and SATĀ® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.