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Overview:
This short video introduces basic concepts in phylogenetics and provides a model to help understand lineage-splitting.
This resource is available from the Peabody Museum of Natural HistoryAuthor/Source:
Peabody Museum of Natural History Grade level:
9-12 Time:
10 minutes Teaching tips:
This video provides a brief and intriguing introduction to phylogenetics. It would make a good opener for a unit in which students learn more about evolutionary trees and work with phylogenies. Concepts: - Through billions of years of evolution, life forms have continued to diversify in a branching pattern, from single-celled ancestors to the diversity of life on Earth today.
- Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry.
- Scientists test their ideas using multiple lines of evidence.
- Scientists use multiple research methods (experiments, observational research, comparative research, and modeling) to collect data.
- Accepted scientific theories are not tenuous; they must survive rigorous testing and be supported by multiple lines of evidence to be accepted.
- Science is a human endeavor.
- Evolutionary trees (i.e., phylogenies or cladograms) are built from multiple lines of evidence.
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