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Using examples of invertebrate nervous systems how can the process of evolutionary cephalization be described?
Considering the instance of invertebrates it is observed that evolution makes the enhancing of the complexity of the organisms to be accompanied by convergence of nervous cells to special structures for controlling and commanding: the ganglia and the brain. In easy invertebrates, like cnidarians, the nervous cells are not concentrated but they are found dispersed in the body. In platyhelminthes a starting of cephalization with the anterior ganglion concentrating neurons is already verified. In annelids and arthropods the existence of a cerebral ganglion is evident. In cephalopod molluscs the cephalization is even big and the brain commands the nervous system.
what is cranium
Explain Methods Used For Estimation of Vitamin C? The most commonly used methods to determine ascorbic acid in foods are: 1. Titrimetric methods - The 2, 6 dichlorophenol in
Applications : The first operation conducted was ligation of a patent ductus arteriosus through a left thoracotomy. Same approach is used for repair of coarctation of the aorta,
Ask In what ways does over gazing lead to soil erosion?
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THEO R Y OF PANGENESIS - Proposed by Charles Darwin. According this miniature present in the every body cell i.e. called gemmule
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Amount of intracellular chloride ions in neuron A Neuron A is a healthy neuron with all the usual ion channels. When at rest with a membrane voltage of R millivolts, neuron A
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