Procedure of evolutionary cephalization
Using the examples of the invertebrate nervous systems how can the procedure of evolutionary cephalization be explained?
Expert
Considering the example of the invertebrates it is observed that evolution creates the increasing of complexity of organisms to be accompanied by the convergence of nervous cells to special structures for commanding and controlling: ganglia and brain. In simple invertebrates, such as cnidarians, the nervous cells are not concentrated however they are found dispersed in body. In platyhelminthes a beginning of cephalization with anterior ganglion concentrating neurons is already verified. In annelids and arthropods existence of a cerebral ganglion is evident. In cephalopod molluscs the cephalization is even greater and brain commands the nervous system.
Which type of polarity do water-soluble and fat-soluble substances correspondingly comprise?
Beneath which environments do echinoderms survive? Answer: The Echinoderms are marine animals, they mainly live in salt-water.
Do enzymes take action better basic pH or under acid?
Describe target organs of the hormones?
How does the making of enzyme substrate complex occur? Elucidate the drop of the activation energy of chemical reactions?
Expalin the statement "Range of process of communication used within a team in the organization".
Write down the main classes in which phylum are divide? Write down some examples of each and in which form (polyp or medusae) are they found?
Name the two groups of defending techniques of the Human body in opposition to harmful or foreign agents? Distinguish between them?
In the long term which are the organs influenced by the chronic Chagas’ disease?
What do you mean by the term conditioned reflex? Briefly explain it.
18,76,764
1927908 Asked
3,689
Active Tutors
1434520
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!