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

Describe class ophiuroidea in general way, Describe Class Ophiuroidea in ge...

Describe Class Ophiuroidea in general way? Brittle stars have a central disc with five long, thin, flexible arms that can be detached from the body at will in times of danger.

Draw a diagram of the longitudinal section, Draw a diagram of the longitudi...

Draw a diagram of the longitudinal section of a mature anatropous ovule and label any ten parts in it.

Define amylopectin - carbohydrates, Define Amylopectin - carbohydrates? ...

Define Amylopectin - carbohydrates? Amylopectin differs from amylose in being highly branched. Short side chains of about 30 glucose units are attached with α (1-6) linkages ap

Conventional cabg on cardiopulmonary bypass, Conventional CABG on Cardiopul...

Conventional CABG on Cardiopulmonary Bypass   Chest is opened by midline incision and median sternotomy. Simultaneously saphenous vein or radial artery is harvested. 'T

Preparation of burette for estimation of reducing sugar, Explain Preparatio...

Explain Preparation of burette for Estimation of Reducing Sugar by Fehling Soxhlet? Preparation of burette - Take a 50 ml burette. 1. Fix the burette into the burette holder

Plant, what is comretun

what is comretun

Does every gene mutation cause alteration in the protein, Does every gene m...

Does every gene mutation cause alteration in the protein the gene normally codifies? Not each gene mutation causes alteration in the composition of the protein the gene codifie

Prophase, Prophase This is the first and longest phase of mitosis .At i...

Prophase This is the first and longest phase of mitosis .At its beginning  all  10 nm segments   of chromatids (= chromonemata)  of the  duplicated  chromatin fibres of interph

How many different types of pseudopods can amoebas have?, Tests of shelled ...

Tests of shelled amoebas are made from a variety of substances including sand grains, chitin and substrate, calcium salts, and even silica. These shells still accumulate in ocean d

How is respiration performed by the larva of amphibians, Q. How is respirat...

Q. How is respiration performed by the larva of amphibians? The larva of amphibians has exclusively branchial respiration this is one of the reasons why it depends on water to

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