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In this episode, Pinky and Petunia explore various ecological relationships. They discuss and provide examples for predation, competition, parasitism, mutualism, and commensalism. Part of "The Amoeba Sisters" series.
(Source: DCMP)
This episode discusses the importance of scientific names and why classification can have major changes due to DNA and cell structure evidence. Pinky and Petunia also cover the taxonomy hierarchy of classification. Part of "The Amoeba Sisters" series.
A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. This video discusses virus structures and why a host is critical for viral reproduction. Part of "The Amoeba Sisters" series.
Speciation is the evolutionary process by which populations evolve to become distinct species. Topics covered in this episode include sympatric and allopatric speciation, as well as several different types of isolation. Part of "The Amoeba Sisters" series.
Provides an overview of how attraction, desire, and sexual coupling lead to conception. Covers the physiological events underlying the process of reproduction. NOTE: graphic content.
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.
Homeostasis is the tendency of biological systems to maintain relatively constant conditions in the internal environment while continuously interacting with and adjusting to changes originating within or outside the system. In this episode, Pinky and Petunia explore the relationship between homeostasis and feedback loops. Part of "The Amoeba Sisters" series. Please note this title includes a discussion on childbirth.
In this episode, host Emily Graslie discusses the philosophy and moral implications of de-extinction. Scientists are exploring de-extinction as a possible mass extinction looms, but who decides which species are brought back to life? Part of "The Brain Scoop" series.
Part of the "Branches on the Tree of Life" series. Describes the discovery of viruses and their structure, how viruses are studied, how they infect their hosts, and how they replicate. Provides details on the T-4 bacteriophage and retroviruses, such as HIV.
They're neither plants nor animals, yet they are some of the most important life-forms on Earth. This video segment explores the world of single-celled organisms: what they eat, how they move, what they have in common, and what distinguishes them from one another.
When facing complex issues, psychologists often break them down into their component parts, and then identify a key cause. This approach is called reductionism, and viewers explore the advantages and disadvantages of reductionism. Students are given a case study and asked to examine the utility of a reductionist approach. Part of the "Core Concepts in Psychology" series.
This short video explores the stages of decomposition of animal bodies and shows how microorganisms found during the decomposition process can provide useful information for criminal investigators. Through forensic experiments, scientists have shown that it may be possible to estimate time of death by sequencing the DNA from the microbes found on and around decomposing bodies. Part of the "I Contain Multitudes" series.
Research in biology would be impossible without a common framework for grouping and distinguishing species. Carl Linnaeus was the first to propose a classification system of organisms. His system developed into the organizational structure used in the life sciences today. Viewers also learn how new scientific names are created and how the existing system has been further refined using DNA studies.
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.
A new transmitter helps protect wireless data from hackers. Other features in this episode include bacteria using DNA to speed their evolution and a new next-generation water harvester that delivers fresh water from air. Part of the "4 Awesome Discoveries You Probably Didn't Hear About This Week" series.
Host Emily Graslie travels to the Denver Museum of Nature & Science, and she explores the health sciences collection. Dr. Nicole Garneau is the curator for the exhibit, and Graslie becomes the newest addition to the DNA collection. Part of "The Brain Scoop" series. Please note: This title shows donated human anatomy to the museum collection.
Researchers Randy Jirtle and Rob Waterland work with agouti yellow mice to study the implications for cloning, nutrition, and disease research. Their research has been called one of the most important studies of the 21st century. It is hugely significant for understanding the relationship between genes and the environment.
David Ray never turns his back on his research, and with good reason. Ray and his team study alligators, crocodiles, and bats. With support from the National Science Foundation, this multidisciplinary team from several universities is mapping crocodile and alligator genomes. Reptiles resembling these have existed for around 80 million years and they are among the first reptiles to have their DNA sequenced. The research will expand knowledge beyond crocodilians to other reptiles, birds, and even dinosaurs.
Part of the "Branches on the Tree of Life" series. Worms with segmented bodies make up the phylum Annelida. Explores the three classes of annelids: Class Polychaeta (feeding, locomotion, and larval stages), Class Oligochaeta (lifestyles, feeding adaptations, and anatomy of freshwater oligochaetes and earthworms), and Class Hirudinea (leeches, crayfish, and worms show adaptations for commensal, parasitic, and scavenger lifestyles). DNA evidence places annelids close to the molluscs on the tree of life.
The cloning of Dolly the sheep can trace its origins all the way back to Charles Darwin's trip to the Galapagos Islands in the 1800s. Darwin's evidence for evolution was overwhelming, but scientists still didn't know how traits passed from parent to offspring. As microscopes improved, scientists were able to see cells divide and eventually discovered the genes that make up DNA. This, along with other technological advances, has opened up an exciting new area of scientific study: nanotechnology.
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
