The ependyma-lined lumen (cavity) of the neural tube, the cerebral part of which remains patent to form the ventricles of the brain, while the spinal part in the adult often is reduced to a solid strand of modified ependyma.
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... not just to the cells of the gonads but into their nuclei (the central compartment of cells containing chromosomes). Insect scientists accomplish ... insect but into the microbes that naturally inhabit their alimentary canal (gut). Genes expressed in these gut symbionts can alter the phenotype ...
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