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Author
Language
English
Description
English naturalist Charles Darwin is among one of the most influential figures in the history of science. Inspired by evidence that he collected during his expedition on the 'HMS Beagle' and his research regarding selective breeding, Darwin theorized that all species descended from a common ancestor. In his groundbreaking work of evolutionary biology, "On the Origin of Species," he details the scientific theory of evolution, which posits that species...
Publisher
Cytographics
Language
English
Description
Mitosis requires cells to organize numerous jumbled chromosomes and then separate them with absolute fidelity into two equal groups. How this extraordinary process is accomplished is still poorly understood.. This video reveals the events of mitosis at a level of detail usually seen only in research laboratories. In addition, two Appendices show mitosis in a classical system, the diatom cell, and some experiments on living cells that illustrate why...
Publisher
Lawrence Jensen
Language
English
Description
Three dimensional animations, supported by aurthoritative narrations, explore the leaf surface and explain the functioning of the guard cells. The viewer is then taken inside the leaf to see the photosynthesis and conducting cells. Witness the dynamic events of guard cell movements, gas exchange and the transport of water and sugars. Animations also illustrate the forms of leaves and how they are modified for dry and aquatic habitats..
Publisher
Cytographics
Language
English
Description
The Volvocales and Chlorococcales share a common ancestry from a cell type exemplified by Chlamydomonas. Using live cells, this video shows how simple evolutionary trends working on Chlamydomonad ancestors have generated diversity and complexity.. In Volvocalean evolution, unicellular ancestors became multicellular (e.g., Volvox) by daughter cells adhering after division. Concurrently, they evolved various advanced characters (e.g., differentiation...
Publisher
Lawrence Jensen
Language
English
Description
Combining images of living plant stages with computer simulations allows you to easily bridge the gap between the familiar plant and the micro-environment contained within it. Three dimensional animations take you inside the flower to witness dynamic events such as pollination, gametophyte formation, fertilization, embryo formation and fruit formation are seen as spectacular computer simulations..
Publisher
Lawrence Jensen
Language
English
Description
Combining images of living plant stages with computer simulations allows you to easily bridge the gap between the familiar plant and the micro-environment contained within it. Three dimensional animations take you in and around reproductive structures such as the sorus, sporangium, and antheridium and archegonium. You see dynamic events such as spore formation, spore release, prothallus formation, sperm release, fertilization and embryo growth..
Publisher
Cytographics
Language
English
Description
Living Cells features greatly expanded coverage of subject matter and extensive additional footage when compared to the original video tape of 1992. The vivid, high-magnification images introduce students to a variety of cells, cellular activities, and subcellular organelles. The video is organized into 24 chapters on specific topics such as actin, microtubules, and flagella.. The Living Cells video offers a most convenient way of accessing beautiful...
Publisher
Cytographics
Language
English
Description
For convenience, biologists divide living organisms into five "Kingdoms": the Monerans (bacteria and cyanobacteria), Protists, Fungi, Plants, and Animals. The Kingdom Protista includes a vast array of tiny eukaryotic cells that lead complex and extraordinary lives far from the eyes of most humans; a dedication to microscopy is vital to see them in all their splendor. This video is a unique resource introducing the viewer to a considerable range of...
Publisher
Cytographics
Language
English
Description
Diatoms are an extraordinarily successful group of organisms and their many thousands of species have diversified and specialized so as to occupy every environmental niche. Part of their success derives from their unique protective cell walls, beautifully elaborate structures made of pure silica. However, living inside walls made of this rigid, refractory material creates many problems. Just how diatoms circumvent these problems provides the major...
Publisher
Lawrence Jensen
Language
English
Description
Combining images of living plant stages with computer simulations allows you to easily bridge the gap between the familiar plant and the micro-environment contained within it. Computer animations take you inside a clump of moss plants to illustrate external structure. You are then transported inside the tips of male and female stems where gametangia (sex organs), sperm release, fertilization and embryo development are illustrated..
Publisher
Cytographics
Language
English
Description
An inspiring and challenging 20 minute video for high school or university biology students. This video starts by emphasizing the central importance of cells in life, and that living cells can only arise from other living cells by cell division. After distinguishing mitosis (nuclear division) from cytokinesis (cell division), several animal cells are shown undergoing mitosis and a 3D animation shows how the mitotic spindle is assembled. Chromosomes...
Publisher
Cytographics
Language
English
Description
The Oedogoniales are remarkable filamentous green algae. Their method of cell elongation is unique, utilizing a donut-shaped ring of soft wall material which is stretched to form the new daughter cell. While Oedogonium is a simple filament, the related Bulbochaete and Oedocladium are branched and Bulbochaete differentiates long hair cells. The zoospore is large and multiflagellated. Sexual reproduction is oogamous and either "macrandrous" or "nannandrous."...
Publisher
Lawrence Jensen
Language
English
Description
Combining images of living plant stages with computer simulations allows you to easily bridge the gap between the familiar plant and the micro-environment contained within it. Three dimensional animations take you inside the pollen cone and the seed cone to see reproductive structures such as sporangia, gametophytes and the archegonia. Witness dynamic events such as pollination, gametophyte formation, fertilization, embryo formation and seed germination.....
Publisher
Cytographics
Language
English
Description
Reproduction in the red algae is unique. No flagellated stages are ever formed, and it is generally assumed that the various reproductive spores are inert. This video demonstrates that spores in many species are actively motile, either by gliding or amoeboid activity. This limited power of movement may turn out to be of considerable significance in survival strategies (e.g. dispersion, optimization of a germination site).. Sexual reproduction is also...
15) Proteus
Publisher
First Run Features
Language
English
Description
For the 19th century, the world beneath the sea played much the same role that outer space played for the 20th. The ocean depths were both the ultimate scientific frontier and the home of imagination and the fantastic...Twenty years in the making and based on images of 19th century painters, photographers and scientific illustrators, Proteus brings these undersea worlds to life in a wonderfully unique film...The central figure of PROTEUS is biologist...
Publisher
The Great Courses
Language
English
Description
Explore the controls that determine which genes are expressed at a given time, where in the body, and to what extent. Controls that act over and above the information in DNA are called epigenetic, and they can be passed on to offspring for a generation or two. Consider the case of honeybees, where a special food affects which genes are expressed, turning an ordinary larva into a queen bee.
17) Biochemistry and Molecular Biology: How Life Works: Episode 25,DNA and RNA: Information in Structure
Publisher
The Great Courses
Language
English
Description
Advance into the last third of the series, where you cover molecular biology, which deals with the biochemistry of reproduction. Zero in on DNA and how its double-helix structure relates to its function. Then look at the single-stranded RNA molecule, which is a central link in the process, "DNA makes RNA makes protein."_x009d_ Also consider how viruses flourish with very little DNA or RNA.
Publisher
The Great Courses
Language
English
Description
RNA is more than simply a copy of the DNA blueprint. Focus on the synthesis of RNA, covering how it differs from DNA replication. Also learn how human cells shuffle their genetic code to make about 100,000 different proteins using fewer than 30,000 coding sequences. Finally, see how knowledge of transcription occurring after death helps forensic scientists establish the time of death accurately.
Publisher
The Great Courses
Language
English
Description
See how the cognitive changes of aging relate to the biological changes discussed in the previous lectures. It turns out that regions of the brain associated with processing speed, executive function, and episodic memory are more susceptible to aging, which may explain why these cognitive functions are particularly susceptible to decline.
Publisher
Kanopy Streaming
Language
English
Description
Algae have sustained life on this planet since they were first modified by the atmosphere with photosynthetic by-products over two and a half billion years ago. From the microscopic to giant seaweeds, over 30,000 different forms exist today. In this program researchers discover how algae can transform, from life supporting to life threatening. Learn how we've depended on algae in the past and see the new ways we are putting them to use in cancer research,...
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