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Branches on the Tree of Life: The Biology of Chordates

18 minutes 8 seconds

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Still image from Branches on the Tree of Life: The Biology of Chordates

Part of the "Branches on the Tree of Life" series. The phylum Chordata includes tunicates, sea lancelets, hagfish, and all familiar vertebrate animals. Explores how these seemingly diverse animals evolved and how the group is unified by four characteristic structures: a hollow dorsal nerve chord, a supportive notochord, gill slits, and a post-anal tail. Key milestones in vertebrate evolution include improvements in swimming and feeding, the evolution of paired fins and a primitive lung, movement onto the land, and the emergence of the amniotic egg. Accessibility options on the DVD are: (1) expanded description, (2) English subtitles in a black box, (3) subtitled description.

Media Details

Runtime: 18 minutes 8 seconds

Branches On The Tree of Life
Episode 1
14 minutes 1 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 2
14 minutes 52 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 3
20 minutes 4 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 4
17 minutes 45 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 4
17 minutes 19 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 5
19 minutes 31 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 6
21 minutes 20 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 7
17 minutes 33 seconds
Grade Level: 9 - 12
Branches On The Tree of Life
Episode 8
12 minutes 25 seconds
Grade Level: 8 - 12
Branches On The Tree of Life
Episode 9
14 minutes 43 seconds
Grade Level: 8 - 12