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A support video for the course, covering the following topics: Band 1: Investigating Life on a Small Scale - examines some of the special problems encountered by very small, i.e. unicellular, organisms,...
Looks at the evolution, phylum characteristics, major classes, larval development and natural history of echinoderms, which live in the sea and have spiny skins, internal skeletons and elaborate hydraulic...
Fertilization and cleavage are shown in the egg of the sand dollar, ‘Dendraster excentricus’. The sperm swim to the surface of the newly spawned eggs through the surrounding layer of the transparent...
Shows gastrulation from the initial invagination to completion in the embryo of the sand dollar ‘Dendraster excentricus’. First shows the free swimming blastula. Primary mesenchyme cells dissociate from...
Describes the characteristics of the echinoderm body plan and shows how it is adapted for locomotion, respiration, digestion and reproduction. Examples of the five classes of echinoderms are shown and the...
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