Symmetry - metazoa, Biology

Assignment Help:

Symmetry - Metazoa

All living organisms have some body shape and form. The general body plan of animals may be organized in one of several ways . Arrangement of parts or organs on either side of an imaginary dividing line or around a common axis or radially around a point so that opposite parts are mirror images of one another is called symmetry. There are two broad divisions of symmetry,

(i) Primary, or embryonic

(ii) Secondary, or adult.

2039_Symmetry - Metazoa.png

Figure:  Different types of body symmetries

The latter may or may not be the same as the primary one. For example, the larva of starfish is bilaterally symmetry but the adult starfish is radially symmetrical. The primary symmetry is bilateral and secondary symmetry is radial. With regard to symmetry animals can be basically of five types

  • Asymmetrical
  • Spherical
  • Bilateral
  • Radial and
  • Biradial

 

 


Related Discussions:- Symmetry - metazoa

Define transport and storage of iron, Define Transport and Storage of Iron?...

Define Transport and Storage of Iron? You have seen that transferrin binds both newly absorbed iron and iron released after degradation of haemoglobin. Transferrin is a glycopr

Explain operational taxonomic units - numerical taxonomy, Explain Operation...

Explain Operational Taxonomic Units - Numerical Taxonomy 1) Then the characters to be used for studying the OTUs are selected. Usually a large number of characters are taken as

How do embryos of placental mammals excrete nitrogen wastes, How do embryos...

How do embryos of placental mammals excrete nitrogen wastes? Placental animals, as well as embryos, excrete urea. In the adult placental mammal urea is excreted by the urine.

What is an operon, What is an operon, and in what type of organism are oper...

What is an operon, and in what type of organism are operons found? An operon is a series of genes that code for exact products and the regulatory elements that control those ge

Define placental secretion of oestrogens during pregnancy, Define Placental...

Define Placental secretion of oestrogens During pregnancy? Placental secretion of oestrogens increase with progression of pregnancy. Oestrogens perform many functions. They sti

Golgi complex, Golgi complex is the organelles in animal cells having a se...

Golgi complex is the organelles in animal cells having a sequence of þattened sacs which sort, chemically modify, and package proteins produced on the rough endoplasmic reticulum.

Cytokinins - apical dominance, Cytokinins - Apical Dominance Cytokinin...

Cytokinins - Apical Dominance Cytokinins are also involved in the regulation of apical dominance. Wickson and Thimann studied the interaction of cytokinins and auxins in contr

Show examples of cnidarians, Q. What are few examples of cnidarians? In whi...

Q. What are few examples of cnidarians? In which environments can these animals be found? Hydra, Jellyfish, sea anemones and corals are good examples. All of them are aquatic,

Endosperm - pollen biology, Endosperm - Pollen Biology The examination...

Endosperm - Pollen Biology The examination of live material of j. montana reveals that the division of the primary endosperm nucleus is transverse, followed by the laying down

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