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  1. Commensalism of ‘Nereis Fucata’ (Polychaeta) (1971 Video)

    Subject
    Biology
    Distribution
    Sale, Videocassette. VHS. col. 17 min., 1996 sale: £25.00 (+VAT +p&p)

    The marine annelid ‘Nereis fucata’ lives in snail shells inhabited by hermit crabs (here ‘Pagurus bernardus’). There have been no morphological adaptations. The important behavioural elements (i.e....

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  2. Interpretation of Experimental Data in Physiology Based on a Study of Calcium Metabolism (1977 Audio)

    Subject
    Medical sciences
    Distribution
    OUT OF DISTRIBUTION, Audiocassette. 60 min.

    The study of calcium metabolism in the body is presented mainly in the form of experimental data, together with questions and answers based on them. Blood calcium, hormonal control of plasma calcium,...

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  3. Conditioned Reflexes (1925)

    Director
    Vsevolod Pudovkin
    Subject
    Biology; Psychology

    Shows Pavlov’s animal work. Nerve system of a frog with orientative reflexes to external irritation, that continue to work after brain removal. The effect of exhibiting food on the salivary secretion of a...

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  4. Biology of Spiders. No. 7: Capture of Prey: Webless Spiders (1965 Film)

    Director
    E R Skinner; G H Thompson
    Subject
    Biology
    Distribution
    Film (16mm)

    Many spiders do not make silken webs. The jumping spiders stalk their prey and pounce when within range. Others lie in wait - they are usually cryptically coloured. The water spider catches prey either on or...

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  5. Vegetative Reproduction in the Alga ‘Stephanopyxis Turris’ ('Centrales’) (1967 Film)

    Subject
    Biology
    Distribution
    Film (16mm)

    Shows the process by which the cells of the colony-forming ‘Stephanopyxis turris’ multiply vegetatively by binary fission. During interphase, the plastids double by simple fission. Cell division is...

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