video record
Media not available in the Digital Archive
This programme illustrates some exceptions to so called 'biological rules' and examines some examples of symbiosis. The speakers are Dr. M.E. Varley, Senior Lecturer in Biology at the Open Universi...ty, and Mr. S.W. Hurry, Senior Lecturer in Biology at the Open University. In the first part of this programme some plants that break general biological 'rules' are demonstrated. These include the dodder Cuscuta, Mimosa, and a variety of insectivorous plants. The structural adaptations seen in the insectivorous plants are discussed and they are seen in action trapping their prey. Some marine animals that look like plants are then illustrated. The second part of the programme examines some samples of symbiosis Types of cleaning symbiosis are shown including that between sea anemones and clown fish. Three examples of symbiosis between unicellular algae and marine animals are then illustrated and discussed.
Metadata describing this Open University video programme
Module code and title: S22-, Comparative physiology
Item code: S22-; 11; 1972
Series: Comparative physiology
Rights Statement: Rights owned or controlled by The Open University
Restrictions on use: This material can be used in accordance with The Open University conditions of use. A link to the conditions can be found at the bottom of all OUDA web pages.
Duration: 00:22:51
Note: 1972;Open University course S22- Comparative physiology.;Production paperwork indicates there was a remake of this programme (VT No. VTM/6HT/70879). It is unclear whether the library holds a copy of this film.
+ Show more...
Producer: Tony Laryea
Contributors: Stephen Hurry; Peggy Varley
Publisher: BBC Open University
Keyword(s): Algae; Bladderwort; Conculata group; Dodder; Giant clam; Hermit crabs; Mantle adaption; Mimosa; Orchids; Parastism; Pitcher plant; Symbiosis; Zoophyta; Zooxanthellae
Footage description: Peggy Varley introduces the programme. The programme is in two parts. Part 1 will demonstrate some biological exceptions found in plants. Part 2 will examine symbiotic relationships. Peggy Varley strokes the leaves of a mimosa plant. There is a very rapid response as its leaves fold up. Stephen Hurry examines the Dodder plant, a parasite Shots of a Dodder plant. Shot of a micrograph showing a cross section of a host stem with Dodder attached. Hurry explains how the Dodder obtains its nutrition. Stephen Hurry examines a series of carnivorous plants. Shots of bladderworts, first life size and then magnified. Commentary by Hurry explains how it traps its prey. Shots of bladderworts trapping water fleas. Shots of a Venus fly trap in action. Commentary by Hurry explains how it traps its prey. Stephen Hurry, with a pitcher plant specimen explains how it, a passive carnivore, catches its prey. Shots of the pitcher plant in action. Shots of a butterwort in action. Commentary by Hurry. Shots of sundew in action. Commentary by Hurry. Shots of an experiment to determine the mechanism which governs leaf reaction in sundew. Peggy Varley shows film sequences on several zoophytes animals which look like plants, shots of several polyps as examples. Peggy Varley defines the concept of symbiotic relationship. She describes the symbiotic relationship between a hermit crab and an anemone. Shots of the two in a tank in the studio. Shots of clown fish and anemone in symbiotic relationship. Shots of shrimp in symbiotic relationship with anemone. Shots of cleaner fish in symbiotic relationship with a grouper and a moray eel. Commentary by Varley explains. Varley next discusses and shows example of the symbiotic relationship between green flatworms and green algal cells. Varley discusses and shows example of the symbiotic relationship between algae and giant clams, (still shots and micrographs) Varley next discusses the symbiotic relationship between green algae and corals. She uses coral skeletons to aid her discussion.
Master spool number: 6HT/70575
Production number: 00522_3103
Videofinder number: n/a
Available to public: no