« previous next »
« previous next »
 

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Some organisms used as models in genetic research Some organisms used as models in genetic research
Research Methods Research Methods
Research reveals that children’s motives for engaging in sports are to have fun and gain skills ... Research reveals that children’s motives for engaging in sports are to have fun and gain skills ...
This depiction breaks stereotypes, but is historically accurate. Shown here is an Iroquois fort. Can ... This depiction breaks stereotypes, but is historically accurate. Shown here is an Iroquois fort. Can ...
Heredity and Traits Heredity and Traits
A wrinkled and round garden pea, the phenotypic traits in one of Mendel’s monohybrid crosses A wrinkled and round garden pea, the phenotypic traits in one of Mendel’s monohybrid crosses
Video: Medullary osmotic gradient - influencing factors

For a complete list of videos, visit our video library