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Determine about the Brain tissue
Brain tissue looks solid to the naked eye (it has a consistency of stiff jelly), so 'finger-grain' investigations had to await two technological developments. The first was the gradual refinement over many years of the light microscope, and second was the discovery of tissue staining techniques that had the effect of 'highlighting' particular component structures of tissue. The combinations of these developments enable researchers to identify small groups of neurons, or even individual neurons, using a microscope. Thanks to technological improvements in lens manufacture, microscopy has developed considerably since its first reported use to examine biological tissues (of a cow) by Van Leeuwenhoek in1674. Light microscope can now reliably magnify by a factor of several hundred, but electron microscope can magnify by a factor of several thousands. They can produce images of images of individual synapses (junctions between neurons), or even of receptor sites for neurotransmitters on the surface of neurons.
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Explain the gradient theoryof experimental embryology
What is the relation between the concepts of chromatin and chromosome? Are euchromatin and heterochromatin part of chromosomes? Every filament of chromatin is a complete DNA mo
How Age factors Affecting the calcium absorption? Age is another factor which influences the absorption of calcium. Fractional absorption of calcium is highest in infancy i.e.,
Contig: Number of uses, all nouns. The term comes from the shortening of the word 'contiguous'. A 'contig' might refer to the map showing placement of a set of clones which comple
larval forms of sponges
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Why plant nutrients said to be essential An element is said to be essential if, (i) The deficiency of an element in plant, makes it impossible to complete the vegetative
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