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Many organisms survive in constantly changing environments, including cycling seasons. Developing embryos show remarkable instant adaptations to the variable environmental challenges they encounter during their adult life, despite having no direct contact with the changing environment until after birth or hatching. The mechanisms by which such non-genetic information is transferred to the developing...
Living beings are extremely complex. Multiple structures, especially evolutionarily young ones, develop or take their final shape during late stages of embryonic development, when the body of an embryo is large and comprised of a huge number of cells. Yet, these late structures frequently need cellular sources from other locations and, sometimes, developmental stages. During recent years it became...
Background Serotonin (5-HT) is well known as widely distributed modulator of developmental processes in both vertebrates and invertebrates. It is also the earliest neurotransmitter to appear during neuronal development. In aquatic invertebrates, which have larvae in their life cycle, 5-HT is involved in regulation of stages transition including larval metamorphosis and settlement. However,...
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