Asymmetrical and spherical - metazoa, Biology

Assignment Help:

Asymmetrical and Spherical - Metazoa

Some creatures are asymmetrical: no matter which way we try to divide them through the middle, no two halves would appear alike. In simpler words: these are animals which cannot be cut into two identical halves through any plane or axis (longitudinal, sagittal or transverse), Amoeba and most of the poriferans are examples.

At the other extreme, is spherical symmetry. The animals with spherical symmetry can be divided into identical halves along a number of planes which pass through the centre or in other words every plane through the centre will yield two halves which arc mirror images of each other. This type of symmetry is found chiefly in some protozoa and is rare in other groups of animals. Actinophrys and colonial Volvox are typical examples.


Related Discussions:- Asymmetrical and spherical - metazoa

Blood flow - circulation, Normal 0 false false false EN...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

What respectively are zygotic meiosis, What respectively are zygotic meiosi...

What respectively are zygotic meiosis, gametic meiosis and sporic meiosis? Zygotic meiosis is the one that happens in the haplontic haplobiontic life cycle. Gametes from adult

Periapical radiography - criteria for endosteal implants, Q. Periapical rad...

Q. Periapical radiography - criteria for endosteal implants? Periapical radiographs are images of a limited region of the mandibular or maxillary alveolus.  Periapical radiogra

Explain the indole production test, Explain the Indole Production Test? ...

Explain the Indole Production Test? Many microorganisms produce an enzyme tryptophanase which oxidizes amino acid tryptophan to produce pyruvic acid, indole and ammonia. We can

To which direction does the growth of one side of a stem, To which directio...

To which direction does the growth of one side of a stem, branch or root induce the structure to curve? While one side of a stem, branch or root grows more than the other side

Magnesium - mineral elements, Magnesium -  It is available in most of t...

Magnesium -  It is available in most of the plants, especially vegetables. By its deficiency diarrhoea is caused. Its important functions are - (a)      Along with c

What do you mean by pericardium, Q. What do you mean by Pericardium? Pe...

Q. What do you mean by Pericardium? Pericardium is the sac covering the heart. Pericardium consists of two layers-the visceral pericardium (epicardium) and the parietal pericar

Disaccharides, Disaccharides can be understood as follows 1.Sugars made...

Disaccharides can be understood as follows 1.Sugars made up of the two monosaccharides held together by the covalent bond; like sucrose and lactose . 2. Type of sugar (sacch

Explain bruce protocol, Q. Explain Bruce Protocol? Bicycle Ergometry ...

Q. Explain Bruce Protocol? Bicycle Ergometry Most bicycle test are performed sitting upright, but supine bicycle test have become more popular. Treadmill Test The

Illustrate about the insulin and insulin syring, Insulin, insulin syringe ...

Insulin, insulin syringe and insulin devices Insulin is the hormone used to treat diabetes mellitus. Insulin is given in the form of injection, because the gastro intestinal tr

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