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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.
Define Secondary level care - public nutrition? More complex health problems of the community are resolved at the secondary level care through the district hospitals and the Co
Properties of Amylopectin and Amylose In plants, starch is packaged in granules, which vary in their shape and size, when isolated from different sources. The size of these gr
Eutrophication "Runaway" growth of the aquatic plants which takes place when agricultural fertilizers containing the phosphorus and nitrogen run off into lakes and ponds; also ult
Phenylketonuria is a severe form of mental disability caused by a homozygous recessive allele. The condition affects about 1 in 10,000 neborn Caucasians. Estimate the frequency of
Which of the following is an active transport process? A. Net flux of sodium across the plasma membrane via voltage-gated sodium channels. B. Net flux of glucose across the
cutaneous respiration in musquito
Q. What is extracellular digestion? Extracellular digestion is so that in which food breaking into utile molecules that can be internalized by the cell is done in the extracell
habitat of protozoa .
Q. Why can the genetic code be qualified as a "degenerate code"? The genetic code is a degenerate code because there are amino acids codified by more than one type of codon, it
(a) Why are herbivores considered similar to predators in the ecological context Describe? (b) Differentiate among the following interspecific interactions in a population :
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