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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.
A 16 year old boy named Jake was admitted into the emergency room complaining of headache, fever, stiffness of abdominal muscles and difficulty swallowing. The doctor on staff bega
heating a food sample with Benedict''s solution is a test for...
An osteoclast is a type of bone cell that absorbs bone tissue by removing its mineralized matrix and breaking up the organic bone. This process is known as bone resorption
Q. What is the life cycle of Plasmodium vivax? The vector mosquito bites a infected person and ingests female and male gametocytes of the parasite. Within the insect gut the ga
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(i) On Figure, draw a ring around the number which indicates the energy entering the system via photosynthesis. (ii) The total energy available to the plants in the ecosystem
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