Three lecture type video clips introduce the concept of cell motility: the biochemical basis of actin-based motility, the biophysical mechanism of polymerization-based force generation, and an evolutionary perspective of cell shape in prokaryotes and eukaryotes.

• More Info

This unit provides three games for students to learn genetic variations and the selective pressure in three different populations (fish, bacteria, flowers). Students will need to select an individual and decide whether the individual has high or low fitness under certain environment. Then students will need to decide whether the change (like mutations of mating) can improve the fitness of that...

• More Info

This unit aims to help students understand how How natural selection can lead microevolution and results in populations that are better adapted to their environment. Students will first play like a bird that eat moths. Two phenotypes of moths are presented, and it is likely that students will eat mostly visible moths and therefore create a selective pressure. Then, students are guided to...

• More Info

This web unit introduces two kinds of speciation (allopatric and sympatric) through an interactive task: the speciation of a group of tropical angiosperms called Fuchsia. Before starting the task, students are advised to review the definition of allopatric and sympatric speciation by entering "click here". In the Fuchsia task, the website presents observations and then ask students to...

• More Info

This segment explains the logic behind why the genome sequences of a few people can represent the genome of human beings, regardless the variation that seems so obvious between many individuals. This segment also uses genome sequences to explain evolution theory. This is part 6 of a 16 part series (http://www.pbs.org/wgbh/nova/genome/program.html) that examines the effects of various...

• More Info