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

Define briefly the enzymatic proteins, Define Briefly the Enzymatic Protein...

Define Briefly the Enzymatic Proteins? The most varied and very highly specialized proteins are those along with catalytic activity - the enzymes. Virtually all the chemical re

How are parasites classified, Concerning the number of hosts how are parasi...

Concerning the number of hosts how are parasites classified? Parasites that need only one host are known as monoxenous parasites. Parasites that need more than one host for th

Factors influencing metabolism, Let us learn about the factors that affect ...

Let us learn about the factors that affect metabolism: 1) More energy is required when muscular work is carried out. 2) The larger the surface area of the body, more heat is

Additional substances does a plant need to make amino acid, a) What additio...

a) What additional substances does a plant need to make amino acids and proteins from glucose? b) Where do these substances come from?   (a) To make amino acids

What is the type of reproduction that occurs in roundworms, What is the typ...

What is the type of reproduction that occurs in roundworms? What typical element do nematode sperm cells have? Nematodes reproduce sexually. The nematode sperm cell does not h

Explain insect resistance, In 2003 nearly 70 million hectares globally were...

In 2003 nearly 70 million hectares globally were planted in genetically modi?ed crops. Of these, 73%  were plants such as soybean, corn and cotton, which were modi?ed to be he

Describe the structure of alginate, Describe the structure of alginate ...

Describe the structure of alginate The commercially available alginates are white to cream coloured powders. 1% alginic acid solution gives a pH value of 2.9 while it is 2.3 an

Structure of the pancreas, Describe the structure of the pancreas. How is t...

Describe the structure of the pancreas. How is the pancreas modified to carry out its various functions? How does the human pancreas compare to that of the fetal pig?

What is suturing technique, Normal 0 false false false ...

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

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