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

Blood collection, Blood Collection: Blood for analysis may be obtained...

Blood Collection: Blood for analysis may be obtained from veins, arteries, or capillaries. Venous blood is usually the specimen of choice, and venipuncture is the method for

How does water move inside sponges, How does water move inside sponges? Wha...

How does water move inside sponges? What is the function of the pores in these animals? Sponges are filtering beings. They make water enter their bodies by their lateral pores

What percentage of the offspring purple flowers have, Purple (P) flowers ar...

Purple (P) flowers are dominant and white (p) flowers are recessive. A homozygous dominant purple flower is crossed with a homozygous recessive white flower. what percentage of the

What are the main negative ions found in living beings, What are the main n...

What are the main negative ions found in living beings? The major anions found in living beings are the chlorine anion (Cl-), the phosphate anion (PO4--), the bicarbonate anion

In high altitudes is it necessary for the blood to have more, In high altit...

In high altitudes is it necessary for the blood to have more or less hemoglobin? In high altitudes the air is rarefied and oxygen concentration is lower than in low altitudes.

Two main pollutants that contribute to acid rain, (a) What are the two main...

(a) What are the two main pollutants that contribute to acid rain? (b) Where do these pollutants come from? (c) What direct or indirect effect is 'acid rain

Explain mitosis properly, Q. Does the mitosis properly occur after or befor...

Q. Does the mitosis properly occur after or before the interphase? Is it a simple "point of view" issue? Mitosis have to be considered a succeeding phase after interphase since

What is the secondary structure of a protein, The secondary protein structu...

The secondary protein structure is produced by the manner its amino acids interact by intermolecular bond. These interactions make a spatial conformation of the polypeptide filamen

Heparinisation-procedures of oxygenators, Heparinisation :  The patient sh...

Heparinisation :  The patient should be fully heparinised before the start of cardio pulmonary bypass. Baseline activated clotting time is measured (ACT). 3 mg (300 units) per k

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