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Ten thousand years ago, corn didn’t exist anywhere in the world, and until recently scientists argued vehemently about its origins. Today the crop is consumed voraciously by humans, by livestock, and as a major part of processed foods. So where did it come from? Evolutionary biologist Neil Losin tells the story of the genetic changes involved in the transformation of a wild grass called teosinte into corn. Evidence from genetics supports archeological findings pinpointing corn’s origins to a very particular time and place in Mexico.
(Source: DCMP)
Researchers hitch a ride with the Mexican Navy to visit the breathtakingly beautiful but critically endangered island habitat of Guadeloupe Island. Led by Drs. Borja Mila and Ellen Ketterson, the team sets out to collect some of the first modern data and genetic samples from the juncos found on the remote island, with the goal of learning the origins and evolutionary history of this mysterious species. What they find could have important implications for the future of this fascinating but imperiled population of juncos. Part of Ordinary Extraordinary Junco (Chapter 5).
Professor Lawrence Gilbert and his team at the University of Texas at Austin have discovered a population of tropical butterflies that exemplify "evolution in action," and a rare research opportunity. Gilbert says they may be witnessing a species of butterfly splitting into two different species. The stars of this research are the Heliconius butterflies, found in Central and South America. Despite the genetic similarities between the two groups of the butterflies, one group is showing a color preference during mating. With support from the National Science Foundation, Gilbert and his team are working to gain insights about genetics, behavior, ecology, and evolution.
Students at UC Davis are working to create high-tech tools to help make agriculture more precise. Some areas of research focus on plant genetics and biotechnology. Also in this episode, an organic farmer and a plant geneticist discuss the goals of sustainable farming. Part of the "9 Billion Mouths to Feed: The Future of Farming" series.
Draws on documentary and archival footage, 3-D and 2-D animations, and high-tech imaging to investigate a variety of virological topics: the nature of pandemics as illustrated by the SARS outbreak in China; genetic sequencing of Spanish influenza from exhumed tissue of a century-old corpse; how animal viruses jump the species barrier; the dissection of live viruses in a biosafety level-4 lab; the work of an Ebola research team in Gabon; the discovery of mimivirus; applications of Onyx-015, a genetically engineered adenovirus; and more. Features Vincent A. Fischetti of The Rockefeller University, Jeffery Taubenberger of the Armed Forces Institute of Pathology, Y. Guan of The University of Hong Kong, Didier Raoult of the French National Center for Scientific Research, and other leading virus specialists.
For centuries, silkworms have been breed to produce strong, fashionable silk threads. Today, the silk industry has joined forces with the biotechnology industry. Researchers are creating genetically modified worms which a produce a protein that aids in clotting blood. Researchers are looking to maybe one day use the protein in medical procedures.
Explore the techniques plant physiologists use to study viruses. Viewers discover how breeders produce tulips with the desired durability, disease resistance, and beauty. Part of "The Botany of Desire" series.
Students are introduced to basic concepts related to heredity. Special emphasis is placed on some easy to understand human traits that are inherited. Concepts and terminology discussed include: characteristics, traits, and inheritance.
Identifying the key molecular players in planarian regeneration may offer clues into how the process may work in other species, including humans. HHMI investigator Alejandro Sánchez Alvarado and postdoctoral fellow Alice Accorsi use RNA-mediated genetic interference (RNAi) to silence different genes in planaria and determine how they affect regeneration.
How does eye color work? Get ready for a long look deep into the genetics and physics of eye color. Part of the "It's Okay to Be Smart" series.
Part of the "The Biology Classics" series. Paramecia are a group of unicellular ciliate protozoa. Shows how paramecia move, feed, digest, assimilate nutrients, achieve water balance, deploy defensive weapons, reproduce, and engage in the sexual exchange of genetic material. Utilizes state-of-the-art microscopy techniques to present a compelling new picture of the life of paramecia.
Arthropod are the most abundant and diverse group of animals in the world. They inhabit every continent and every ocean, and they outnumber all other animal groups combined. This episode investigates what arthropods are, where they come from, and how they have succeeded through genetic mutation, diversity, exploitation, and coevolution. Part of the "Nature's Microworlds: Insect Specials" series.
Part of the "Inside the Living Cell" series. Shows how DNA replicates; how copy errors occur and are subsequently corrected by repair enzymes; and how DNA is compressed into chromosomes, making mitosis and cell division possible. Provides an overview of DNA structure, replicating DNA, mutations that change the genetic code, proofreading and repair, and the stages of mitosis.
Host Emily Graslie discusses a new scientific theory about mammalian diversification. According to this new theory, placental mammals evolved before a major mass extinction event, which occurred sixty-five million years ago. However, there is no fossil record to prove the new theory, but scientists around the world used genetic material to form their theory. Part of "The Brain Scoop" series.
National Geographic takes a visit to the American Prairie Reserve in Montana and discover their mission of animal habitat protection. The Reserve is working to restore a balanced ecosystem on millions of intact land in Montana. They have decided to start with a special genetic group of bison. Segment of video from Wild Chronicles Series.
Part of a series that features a wide variety of video footage, photographs, diagrams, graphics, and labels. For this particular video, students will focus on single gene disorders which cause genetic diseases like cystic fibrosis, fragile X syndrome, and muscular dystrophy. Part of the Science Video Vocab series.
Contains 8 segments: "Matter and Energy for Life," "Ecosystems," "Populations," "Homeostasis: The Body in Balance," "Inheritance," "Behavior and the Nervous System," "Biodiversity," and "The Biosphere." Students have opportunities to become involved in hands-on activities. Supports the learning of key concepts in biology in tandem with the textbook also offered by the publisher.
The evolution of the arms, legs, necks, and lungs of the human body can be traced to a fish that lumbered onto land some 375 million years ago. The genetic legacy of this creature can be seen today in human DNA, including the genes used to build hands and limbs. Part of the “Your Inner Fish” series. Please note this title shows corpses in anatomy labs and contains mature themes.
Part of the "Inside the Living Cell" series. Illustrates how genetic instructions carried on DNA are transcribed into RNA, leading to the production of specific enzymes that control the thousands of biochemical processes occurring in living cells. Provides an overview of the protein basis of life, enzymatic reactions, amino acids and DNA, how proteins are built, and gene activation.
Showing collections 1 to 2 of 2
Biology related concepts
A collection containing 59 resources, curated by Benetech
Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center
