PBS
How Our Deadliest Parasite Turned To The Dark Side
Around 10,000 years ago, somewhere in Africa, a microscopic parasite made a huge leap. With a little help from a mosquito, it left its animal host - probably a gorilla - and found its way to a new host: us.
Crash Course
Photosynthesis: Crash Course Biology
Hank explains the extremely complex series of reactions whereby plants feed themselves on sunlight, carbon dioxide and water, and also create some by products we're pretty fond of as well.
Crash Course
The History of Life on Earth - Crash Course Ecology
With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and...
Crash Course
Plant Cells: Crash Course Biology
Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to & different from animal cells.
Catalyst University
Amino Acid Biosynthesis | Biosynthesis of Tryptophan
In this video, I discuss the biosynthesis of the third aromatic amino acid, Tryptophan, from chorismate which occurs in the plastid (chloroplast).
Schooling Online
Biology Cells as the Basis of Life: Cell Structure - Plant Cells Part 3
Sadly, it’s their last day in the Garden of Babylon. But nothing cheers up Sally like a shopping spree! The class is off to buy souvenirs before they say farewell to this wonderful city. This lesson will conclude our introduction to the...