Media-rich detailed description of modern cloning technology and the two different processes used: artificial embryo twinning and somatic cell nuclear transfer.
Video and text present a good explanation of what mutations are. [1:41]
Animated tutorial with captions shows how stem cells play many important roles in our bodies from conception through adulthood.
The shared set of genes for body segments, possessed by all animals, are discussed in this video segment from Evolution: "Great Transformations."
Learn how genetic variation is the raw material of evolution, and learn how restricted gene flow can lead to the formation of new species. [11:52]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
This video examines the threat of a virus being spread from birds to humans, and then from humans to humans. It details the mechanisms viruses use to infect cells, and explores how mutations in a virus may change its virulence and how it can spread. It also looks at work being done with a re-created flu virus -- from the deadly 1918 strain -- that may help prevent future flu pandemics. [5:08]
In this video profile adapted from NOVA scienceNOW, learn about geneticist and rock musician Pardis Sabeti, whose innovative insights into natural selection demonstrated how beneficial mutations spread quickly through a population. [5:04]
This is a resource for students to use in their study of minerals. It begins with a general description that includes the list of essential characteristics of a "mineral." Minerals are then grouped alphabetically. Selecting a name provides large colorful pictures from the Smithsonian and a description. There are also special sections for Carbonates, Oxides, Sulfides and Sulfates, and Phosphates.
Site studies what air is as well as what composes the atmosphere.
This resource describes how the mechanical properties of the lithosphere and asthenosphere change as the temperature and pressure increase. This can cause rocks to flow and become plastic-like.
Listen to this podcast which explains the basics of plate tectonics on Earth. [0:39]
Listen to this podcast which explains the various processes that form sedimentary rock. [0:32]
This lesson will present how to identify and classify sedimentary rocks. It is 3 of 3 in the series titled "Geology: Sedimentary Rocks." [4:29]
This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.
Use the search to find information on rock forming minerals. Characteristics including formula, color, cleavage, and hardness are presented in an easy-to-read chart.
Georgetown University site with a lengthy article on many aspects of gene therapy. Includes background and historical information and numerous resources on the topic. Focus here is on the ethics of these types of therapies.
Use this animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical and unique characteristics of the Blackbar Soldierfish. They can be viewed live on the webcam.
This Georgia Aquarium resource is about the Mourning Gecko. An all female species, the mourning gecko is parthenogenetic, meaning it can reproduce without males.
The meaning and cause of refraction--as well as Snell's law of refraction--are discussed. Includes an interactive problem-solving form in which visitors relate angles of refraction to the incident angle and the indices of refraction.
This resource for geothermal energy education features a slide show with instructive graphics.