To rate this resource, click a star:
This 13-minute film describes how scientists have pieced together the evolutionary history of the Antarctic icefish by studying its genome – an excellent case study for genetic evolution as both the gain and loss of genes have led to key adaptations.
Howard Hughes Medical Institute
HHMI provides a variety of teacher resources to accompany this video: an in-depth film guide, student quiz, two demonstrations and three student lessons.
- There is a fit between organisms and their environments, though not always a perfect fit.
- An organism’s features reflect its evolutionary history.
- Variation is the result of genetic recombination or mutation.
- The variation that occurs within a population is random.
- Evolution results from natural selection acting upon variation within a population
- Traits that are advantageous often persist in a population.
- Natural selection is dependent on environmental conditions.
- Environmental changes affect opportunities and can influence natural selection.
- Scientists test their ideas using multiple lines of evidence.
- Scientists use multiple lines of evidence to study life over time.
- There is variation within a population.