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

Define the major source of vitamin a, Define the major source of vitamin A?...

Define the major source of vitamin A? The major source of vitamin A, as you may be aware, is the carotenoid pigments which are synthesized by plants. Several carotenoid possess

Why should posterior wall preffered during surgery, Why should Posterior wa...

Why should Posterior wall preffered during surgery Posterior wall should not be perforated during surgery. This limits bleeding from the pterygoid plexus or branches of the max

Evolution, species dynamicsresemble what

species dynamicsresemble what

Man-made disasters- fire, A fire hazards is any situation when there is a ...

A fire hazards is any situation when there is a greater risk of harm to the people or the property due to fire. Causes 1.      Overloaded electricity systems. 2.      St

How pregnancy and lactation affects the bmr, How Pregnancy and Lactation af...

How Pregnancy and Lactation affects the bmr? These periods of physiological stress also has an impact on the metabolic rate. Earlier, we studied that REE is highest during the

What is energy, What is Energy ? Energy Energy is defined as the cap...

What is Energy ? Energy Energy is defined as the capacity to do work. Work is defined as the movement of a mass, or the product of the force and the distance through which t

Kingdom animalia, critera for the animal classification

critera for the animal classification

Zoonoses disease-campylobacteriosis, Campylobacteriosis The genus Camp...

Campylobacteriosis The genus Campylobacter has been long associated with the cause of veterinary diseases under different names. It is only in the last 30 years that these org

Carpentier -edwards valve-biological valves, Carpentier -Edwards Valve (C-E...

Carpentier -Edwards Valve (C-E) :  This is porcine aortic valve preserved in gluteraldehyde and mounted on flexible stent made of cobalt-chromium-nickel alloy (ELGILOY). Glut

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