Metazoan branches, Biology

Assignment Help:

Metazoan Branches

The Kingdom Animalia comprises all the multicellular animals (metazoans). These are divided into three branches:

  1. Mesozoa
  2. Parazoa
  3. Eumetazoa

The Mesozoa comprise a tiny single phylum (Phylum Mesozoa); the Parazoa comprise two phyla a tiny single phylum Placozoa and the rest make up the phylum Porifera comprising the sponges. Most of the metazoans come under the major branch Eumetazoa You must note that the cellular layers of Porifera (sponges) are not homologous to the germ layers of Eumetazoa. Their developmental pattern is also quite different from that of the Eumetazoa. The Parazoa are regarded as an early evolutionary side branch of the animal kingdom, which did not give rise to any other group of animals.


Related Discussions:- Metazoan branches

Energy metabolism, Energy Metabolism In the preceding sections of the ...

Energy Metabolism In the preceding sections of the unit, you studied how the products of digestion of food, viz: amino acids, sugars and fatty acids are absorbed and transport

Transport of substances done across the bryophyte tissue, How is the transp...

How is the transport of substances done across the bryophyte tissues? How is this feature related to the general size of these plants? In bryophytes there are no water-conduct

How are birds characterized, Q. Bird identity card. How are birds character...

Q. Bird identity card. How are birds characterized according to examples of representing beings, basic morphology, respiration, skin, nitrogen waste, circulation,thermal control an

Steps to follow in diagnosis of dysentry, Assessment   The child with dy...

Assessment   The child with dysentery will present you with sudden onset of fever, prostration, vomiting, bloody diarrhoea, abdominal pain and tenesmus. Patient may suffer from

What are the techniques of rastelli operations, What are the Techniques of ...

What are the Techniques of rastelli operations ? After median sternotomy pericardial patch is harvested and then cardiopulmonary bypass instituted using aortic and bicaval cann

Why is vision important for life on earth, Q. What is vision? Why is vision...

Q. What is vision? Why is vision important for life on earth? Vision is the ability of some living beings to distinguish, to perceive and to interpret luminous stimuli. Visi

Explain the bioelectrical impedance analysis (bia), Explain the Bioelectric...

Explain the Bioelectrical impedance Analysis (BIA)? The difficulty of measuring total body water (TBW) by Isotope Dilution Method led to the search of Bioelectrical Impedance A

Describe the epithelial cells of the kidney proximal tubule, Epithelial cel...

Epithelial cells of the kidney proximal tubule ?   A.  The sodium-glucose co-transporter in the luminal membrane is responsible for the net flux of glucose from luminal space to

Describe the developmental periods of coronary artery diseas, Describe the ...

Describe the Developmental Periods of coronary artery diseases? The development of coronary artery disease like many other diseases can be divided into the following periods:

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