FIVE FINGERS OF EVOLUTION VIDEO:
What prevents closely related species from interbreeding? Informative and has a good interactive activity.
PREZYGOTIC BARRIERS:
POSTZYGOTIC BARRIERS:
POLYPLOIDY EVENT:
1. Explain the polyploidy event.
2. How does Claude dePamphilis and his team explain the increased diversity in flowering plants?
SPECIATION: Of Ligers and Men. CRASH COURSE BIO #15: Thanks Sophie for sharing this!
GREAT LECTURE REVIEW and ANEUPLOIDY:
GREAT VERY INFORMATIVE POLYPLOIDY ANIMATION with Prequiz, postquiz. Good meiosis review!
PHYLOGENETIC TREES ANIMATION.McGRAW HILL.
QUESTIONS:
1. What does a phylogenetic tree represent?
2. What do nodes represent?
3. Explain the difference between homologous and analogous structures.
4. Explain the difference between shared and derived characteristics.
5. What is a cladogram?
GENETIC DRIFT ANIMATION. Mc GRAW HILL. 5 quiz question included on animation.
Miller and Urey's Experiment. McGraw Hill video.
Miller and Urey's Experiment. Animation and Quiz
RNA's role in Early Earth. You Tube video
ENDOSYMBIOTIC THEORY. McGraw Hill video.
How did evolution of complex life on earth begin? You Tube Video.
READING: The Origin of Complex Life: It Was All About Energy. Discover Magazine Blogs
SCIENCE WEEKLY PODACST The Origin of Life on Earth:
ISOLATING MECHANISMS: pbs.
EVO-DEVO: WHAT IS EVO-DEVO. Nova
FOSSILS
1. Preserved in Tar, Relics From Long Before Freeways.
LOS ANGELES — No one expects to stumble across a cache of Picasso’s works in the middle of a desert. So who would think that just off bustling Wilshire Boulevard, tucked between the Los Angeles County Museum of Art and the national headquarters of the Screen Actors Guild, lie buried some of the most exquisitely preserved fossils in the world?
1. CLICK HERE to read an article about Ardi, the fossil skeleton that has replaced Lucy from being the first bipedal hominid.
2. CLICK HERE to access a website that allows you to access an animation where you can pick an isotope from the menu and click the "start" button. In the top picture, you'll see the atoms change color as they decay; the lower picture is a graph showing the number of atoms of each type versus time.
3. CLICK HERE to participate in a simulation that explains how scientists piece together the events in Earth's history.
4. CLICK HERE to read a short article about how a flying insect left an impression of its body.
ENDOSYMBIOTIC THEORY
11. THIS WEBSITE contains great information on the Origin of Life on Earth (Heterotroph Hypothesis)
1. CLICK HERE to watch a narrated animation on the endosymbiotic theory. You can take a two question quiz after watching the animation. How did you do?
2. CLICK HERE to access a website with very good and helpful information on the Endosymbiotic theory. What do you think?
HOW DOES EVOLUTION WORK?
1. CLICK HERE to access the website with the video clips we watched in class.
1.1 Which video clip do you find the most interesting? Why?
2. CLICK HERE to view an animation that shows how natural selection forces evolution of the finches population on a small island in the Galapagos. You will be asked to interact with the animation at the end. And you can take a 2 question quiz after watching the animation.
How did you do?
How does speciation occur?
3. CLICK HERE to view an animation that witness how the pollenpeeper (fictional organisms) evolve due to natural selection and adaptive radiation.
4. CLICK HERE to read about how the lack of genetic variation in Irish potatoes contributed to the severity of the Irish potato famine.
4.1. Why are populations with low genetic variation more vulnerable to changing environmental conditions than are diverse populations?
4.2. What are the sources of genetic variation?
4.3. Why is there little or no genetic variation in the the “lumper” potato variety?
4.4. Why does planting genetically uniform crops increase the risk of “losing it all” when environmental variables change?
ARTICLES:
1. THE SEARCH OF GENES LEADS TO UNEXPECTED PLACES. Source NY times.
In the 1950s, the study of homology entered a new phase. Scientists began to discover similarities in the structure of proteins. Different species have different forms of hemoglobin, for example. Each form is adapted to a particular way of life, but all descended from one ancestral molecule.
2. HUMAN CULTURE, AN EVOLUTIONARY FORCE. Source NY Times
Genes enabling lactose tolerance, which probably resulted in more surviving offspring, were detected in cultures like the Kenyan shepherd's
3. CLICK HERE to access the SCIENCE TIMES: EVOLUTION page with multiple interesting articles on evolution.
4. A Marine Chemist Studies How Life Began. Source: NY Times.
When I arrived at U.C.S.D., I met Stanley Miller, who’d been a student of Nobel Prize-winning chemist Harold Urey. In 1953, they completed the classic experiment on the chemical origins of life.