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Branches on the Tree of Life: The Biology of Algae

19 minutes 31 seconds

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

Part of the "Branches on the Tree of Life" series. The term "algae" is a catchall for several evolutionary lines of photosynthetic organisms: dinoflagellates, red algae (plastids with chlorophyll A), diatoms, yellow-brown algae and brown algae (chlorophylls A and C), and green algae (chlorophylls A and B). Explores the diversity, structure, ecological roles, and modern classification of these primary producers. Accessibility options on the DVD are: (1) expanded description, (2) English subtitles in a black box, (3) subtitled description.

Media Details

Runtime: 19 minutes 31 seconds

Illustration of plant structure. Caption: the photon's energy transfers to an electron.
Branches On The Tree of Life
Episode 1
14 minutes 1 seconds
Grade Level: 8 - 12
Sea floor with irregularly shaped white objects on it. Caption: composed almost entirely of hexactinellid sponges.
Branches On The Tree of Life
Episode 2
14 minutes 52 seconds
Grade Level: 8 - 12
Microscopic view of a transparent tube-shaped organism. Caption: an energy reserve the cell can draw on
Branches On The Tree of Life
Episode 3
20 minutes 4 seconds
Grade Level: 8 - 12
Tangle of thread-like substance. Caption: consisted of a nucleic acid core composed of either DNA or RNA
Branches On The Tree of Life
Episode 4
17 minutes 45 seconds
Grade Level: 8 - 12
Blurry microscopic view of an oval shaped object surrounded by green particles. Caption: In nature, these small organisms become links in food chains
Branches On The Tree of Life
Episode 4
17 minutes 19 seconds
Grade Level: 8 - 12
Straight line of light against a light blue background. Caption: in the 50-to-80-micrometer range.
Branches On The Tree of Life
Episode 5
19 minutes 31 seconds
Grade Level: 8 - 12
Closeup view of thin, light green tube-like structures growing off stone. Caption: and absorb the products of digestion,
Branches On The Tree of Life
Episode 6
21 minutes 20 seconds
Grade Level: 8 - 12
A cell being viewed under a microscope. Caption: you can clearly see many of the larger structures
Branches On The Tree of Life
Episode 7
17 minutes 33 seconds
Grade Level: 9 - 12
A sea anemone with a captured crab, surrounded by other plant life. Caption: Even a large crab can be digested within a few hours.
Branches On The Tree of Life
Episode 8
12 minutes 25 seconds
Grade Level: 8 - 12
Underwater plants with small fish swimming through them. Caption: Flatworms were around for a long time.
Branches On The Tree of Life
Episode 9
14 minutes 43 seconds
Grade Level: 8 - 12