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The size and number of mitochondria markedly increase at the early stages of oogenesis in the loach (Misgurnus fossilis). The growth of mitochondrial membranes in the oocytes is characterized by the contact with the rough endoplasmic reticulum. In the period of slow growth of oocytes, the number of mitochondria increases 82 times and by the beginning of(More)
Fertilized eggs of the clawed toad Xenopus laevis were placed aboard of orbital laboratory of "Salut-6" spacecraft where they developed for 20 days at temperature 15 degrees C. The larvae were fixed in weightlessness. Light and electronmicroscopic studies revealed undisturbed structure on the saccular and utricular maculae and otolith membranes. Some(More)
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