Shell - body form protozoans, Biology

Assignment Help:

Shell - body form Protozoans

Majority of protozoans posses an exoskeleton in the form of a shell, also called test. The shell forms a loose covering around the body of the animal. It may have one to many apertures, through which pseudopodia of the animals can be protruded. The shells vary in their structure, material and mode of formation in different protozoans and are generally composed of:

  • Organic material i.e. chitin or tectin also known as pseudochitin as found in Arcella.

244_Shell - body form Protozoans 1.png

  • Inorganic matter such as small sand grains or diatom shells, echinoderm plates etc., giued together by a chitinous or pseudo chitinous secretion as in Diflugia. Shells of Foraminiferans (amoeboid protozoans) are beautiful and are chiefly composed of calcium carbonate.

2164_Shell - body form Protozoans 2.png


Related Discussions:- Shell - body form protozoans

Composed of only glucose monomers, Which of the following is composed of ON...

Which of the following is composed of ONLY glucose monomers? (mark all that apply) Select one or more: a. Starch b. glycogen c. Maltose d. chitin e. Cellulose

Explain the indications for neuropsychological screening, Explain the Indic...

Explain the Indications for neuropsychological screening Nature of referral question warrants it. Situational explanation for changes in emotions or cognitive functioni

What are the major significant organic molecules for humans, Q. What are th...

Q. What are the major significant organic molecules for living beings? Ans. There are many types of organic molecules that are important for the living beings. Particularl

Nerves - organisation of nervous system, Nerves - Organisation of Nervous S...

Nerves - Organisation of Nervous System Due to the pattern of distribution of neurons as described above, there are bundles of nerve fibers, called nerves, connecting the cent

What are the major plant tissues, What are the major plant tissues that for...

What are the major plant tissues that form the rings observed on stem sections of some trees? The rings observed on a stem cross section of the dicot trees are made of conducti

How does the intensity of facilitated diffusion differ, Q. How does the int...

Q. How does the intensity of facilitated diffusion differ in relation to the concentration of the moved substance? What is limiting factor? Like simple diffusion facilitated di

What do you mean by blackcaps, Q. What do you mean by Blackcaps? Blackc...

Q. What do you mean by Blackcaps? Blackcaps are small songbirds found throughout Europe. A large population of blackcaps inhabits the forests of Germany. These blackcaps have t

Infective endocarditis, Infective Endocarditis It is an infection of...

Infective Endocarditis It is an infection of the endocardial surface with micro organisms present in the lesion. The endocardium is contagions with the valves of the heart.

Myoglobin, Myoglobin We can build up the structure of haemoglobin by c...

Myoglobin We can build up the structure of haemoglobin by considering a single unit or monomeric form caned myoglobin. This consists of a single polypeptide chain the globin i

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