The process of evolutionary cephalization be described, Biology

Assignment Help:

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.

 


Related Discussions:- The process of evolutionary cephalization be described

Define dietary and non dietary factors - causation of cancer, Define Dietar...

Define Dietary and Non Dietary Factors - Causation of Cancer? Several dietary and non-dietary factors (including genetics) can increase the risk in the causation of cancer. Som

What are the functions of fibers, Of which substance do elastic fibers of t...

Of which substance do elastic fibers of the connective tissue are made? What are some functions of these fibers? The elastic fibers are made of a protein called elastin. Ela

What are some functions of the cartilages in the human body, What are some ...

What are some functions of the cartilages in the human body? Cartilages are responsible for the structural support of the nose and ears. The trachea and the bronchi are also or

Determine the implant failure after abutment connection, After Abutment Con...

After Abutment Connection The patient may complain of pain during screw tightening. Any clinical evidence should be looked into. It is important not to overtighten and overtorq

Are there chloroplasts in cyanobacteria, Are there chloroplasts in cyanobac...

Are there chloroplasts in cyanobacteria? In cyanobacteria there are no chloroplasts and the chlorophyll layers are dispersed in cytosol. Which chemical element is central in

Neurosecretory cells and neurosecretion, Neurosecretory Cells and Neurosecr...

Neurosecretory Cells and Neurosecretion We have before said that the neurosecretory cells are an important component of the non- chordate endocrine system. Of course, they are

Estrus - estrous cycle, Estrus - Estrous cycle This is the period of h...

Estrus - Estrous cycle This is the period of heat, and copulation is permitted only at this time. This condition lasts from 9 to 15 hours and is characterised by a high rate o

Is this still science, If water dousing, homeopathic cures, and so on work ...

If water dousing, homeopathic cures, and so on work for just me but not for anyone else, it is still science.

Pennetula, identifying characters of pennetula

identifying characters of pennetula

Define morphallaxis, a) Describe with the help of a suitable example for ea...

a) Describe with the help of a suitable example for each of the following terms : (i) morphallaxis (ii) epimorphosis and (iii) compensatory regeneration.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd