Why did carbon marry hydrogen? They bonded well from the minute they met. Here is a video that focuses on the essential chemicals for life: water, carbon, nitrogen, and phosphorus. It relates each of these to macromolecules and the way...

Climate change has happened throughout the history of the planet, and the video uses examples from continental drift to modern airplanes as measurable examples. It begins with how climate change will impact systems on the...

"The one process ongoing that will take millions of years to correct is the loss of genetic and species diversity by destruction of natural habitats" - E.O. Wilson. Here is a video that discusses biodiversity at multiple levels from...

Explain the defense systems of both plants and animals against pathogens with a biology video. It covers the disruption of the immune system through hypersensitive responses, normal responses, nonspecific immune responses, as well as the...

Explain how viruses use the lytic and lysogenic cycles with an explanatory video. The resource also describes retroviruses and the virulence of bacteria. 

Viewers explore real-world examples of both evolution and natural selection as the instructor discusses changes to the environment, mutations causing changes in phenotypes and changing the fitness in organisms, and how humans are...

Some scientists believe humans are no longer evolving and have reached their evolutionary peak. In the video, scholars explore Darwin and his published work, The Origin of Species. The instructor discusses Darwin's ideas of biogeography,...

Humans share about 50% of their genes with a banana. In the video, scholars analyze the scientific evidence for evolution. The instructor spends time discussing Darwin and biogeography, fossils, and homologous structures. Scholars then...

No, a cladogram is not a new mass measurement beyond kilo. In the video, scholars watch as a simple cladogram is constructed consisting of seven organisms with shared characteristics. From this, the instructor asks where a new organism...

Scholars learn how rock layers, shift, and move over time. The instructor shows viewers how to solve geologic problems to determine the order of rock layers from oldest to youngest through a drawing video and then actual...

Explore how DNA, genes, and proteins are tied together to make life. Scholars learn about the central dogma, connecting DNA, which is inherited, to RNA and then to proteins, all which make the diversity of life today. 

About 70 percent of the genes of the stickleback fish are the same as humans. In the video, scholars further explore the stickleback fish and its history, from being removed from Loberg Lake to their change and comeback. Over time, these...

Operons operate on sections of genes. A video begins by explaining that operons are located mainly in bacteria, specifically focusing on lac operon. This lac operon, found in E.coli, breaks down lactose. It then shows how lac operon...

Show learners how to apply genotypes of parents to a Punnett square to determine potential genotypes and phenotypes of offspring with a video that explores monohybrid crosses and then complete a dihybrid cross as well. 

The largest concentration of free-roaming wildlife in the continental United States is found in Yellowstone National Park. A video describes the three main types of population interactions: mutualism, commensalism, and parasitism. It...

Are you Excelent with spread sheets? Video begins with an explanation of populations and life cycles of both plants and animals. Then it walks through how to model generations of a population by using a spreadsheet. It is the...

How do we know global warming isn't just mother nature having hot flashes? The video describes the greenhouse effect and how it is necessary to life on this planet. Then it explains greenhouse gases and how increasing them can lead...

Living and non-living things are both a part of an ecosystem. A video begins with ecosystem interactions using biotic and abiotic factors. It also covers food webs, limiting factors, and logistic growth. As a real-world connection, it...

Don't be a lone wolf, learn how the reintroduction of wolves in Yellowstone Park altered the biotic and abiotic factors. Video describes the impact of biotic and abiotic factors at multiple levels. It highlights the examples of food...

Focus on macro-molecules including nucleic acids, proteins, lipids, and carbohydrates. A video explains which are monomers, which form polymers, and the process of changing from one to the other. It also covers the characteristics of...

Materials don't need a password to move through cell membranes! Learners explore how cells move materials across the cell membrane. The video then teaches the detailed workings of both passive transport (specifically diffusion,...

Wow, the human body is complex! The video explores the importance of oxygen, beginning with exploring why it is needed in combustion and then moving into an organism's need for oxygen. Learners see how glucose, when combined with oxygen,...

Free energy, get your free energy here! Learners see that all organisms require free energy, which comes from the sun. The lesson explains the first two laws of thermodynamics and then analyzes metabolism, via glycolysis, on a very...

How does something remain the same in order to change? The video discusses homeostatic evolution from both the continuity and changing perspectives. An analysis of the excretory system in flatworms, earthworms, and vertebrates shows...