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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.
Photometer Photometer (Figure shown below) measures the intensity of light. The metallic plate A is a photocell which emits electrons from its surface when light of sufficient
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Explain about the increases or decreases or shifts in demand terminology. Market into equilibrium P 1 Q 1 , here demand D 1 equals supply S 1 • When price reduce fromP 1
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What is the dissimilarity between the lateral and the apical buds of the plants? The Lateral buds are portions of meristematic tissue located in the base of the shoots. The Api
Q. (a) In droplet infection (i) where do the droplets come from, (ii) what infective agents might they contain? (b) Give two examples of diseases normally spread
sea divisions
Metabolic Process Location Within the study of biochemistry, what tends to obtain lost amidst the numerous pathways and enzymes is the fact which metabolism concerns the overal
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