« previous next »
« previous next »
 

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Apical and Lateral Meristems (Part 2) Apical and Lateral Meristems (Part 2)
Part C - Determining genotypes in autosomal recessive pedigrees Pedigree 3 from Part C - Determining genotypes in autosomal recessive pedigrees Pedigree 3 from
How to solve equations that contain sine using special triangles (Part 2) How to solve equations that contain sine using special triangles (Part 2)
Structures of the ionized forms of some representative fatty acids (part 1) Structures of the ionized forms of some representative fatty acids (part 1)
Government By the People, 2016 Presidential Election, 26th Edition Government By the People, 2016 Presidential Election, 26th Edition
Finding the angle from a ratio (Part 1) Finding the angle from a ratio (Part 1)
Video: Photosynthesis and Van Helmont Experiment

For a complete list of videos, visit our video library