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That is, some embryos with spiral cleavage appear indeterminate, and some with radial cleavage appear determinate. Like many spiders, some insects can walk on water, and they do so in much the same way—by balancing the pull of gravity on their featherweight bodies with the physical principles of buoyancy and surface tension. Each pouch eventually pinches off from the gut as a complete coelomic compartment. Most of the muscle bands in tardigrades consist of only a single muscle cell or a few large muscle cells each.
Pages: 56
Publisher: Field Studies Council (December 1983)
ISBN: 1851531556
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