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

Acute mitral regurgitation-mitral regurgitation, Acute Mitral Regurgitation...

Acute Mitral Regurgitation :  This may be caused by chordal rupture, infective endocarditis or acute myocardial infarction. In acute myocardial infarction, one of the papilla

Amino acids, An amino acid is amphiprotic (have both acid and base)  ...

An amino acid is amphiprotic (have both acid and base)              o    Some are polar, non polar, acidic or basic List of amino acids (red are non-polar, yellow are

What is the relationship between these cells and hiv, Q. What are CD4 lymph...

Q. What are CD4 lymphocytes? What is the relationship between these cells and HIV? How does HIV replicate? The CD4 lymphocytes are T helper lymphocytes that present in their pl

Activation domains, Unlike  DNA  binding  domains  and  dimerization  domai...

Unlike  DNA  binding  domains  and  dimerization  domains,  no  general  structural motifs have since been identified  in the activation  domains  of diverse transcription factors.

What are main successful vaccines, Main successful vaccines are live attenu...

Main successful vaccines are live attenuated and heat killed vaccines.

What is facultative anaerobic beings, What is the difference between facult...

What is the difference between facultative anaerobic beings and obligate anaerobic beings? Facultative anaerobic beings, such as the fungi Saccharomyces cerevisiae, a brewing y

Which elements contains carbohydrates, (a) Which elements contains Carbohyd...

(a) Which elements contains Carbohydrates (b) Which elements contains Proteins   a) Carbohydrates contain the elements carbon , hydrogen and oxygen. b) Protei

Carbohydrates, Carbohydrates These form about 1%part of protoplasm, the...

Carbohydrates These form about 1%part of protoplasm, they are comparatively simpler compounds of carbon, hydrogen and oxygen in the ratio 1:2:1 The ratio hydrogen to oxygen is

What are complementary genes, What are complementary genes? Does this inher...

What are complementary genes? Does this inheritance pattern obey Mendel's second law? Complementary genes are the different genes that act together to determine a given phenoty

What is thermoregulation in cold, What is Thermoregulation in Cold? Hea...

What is Thermoregulation in Cold? Heat production parallels the increase in O 2 uptake, the magnitude of which depends on the muscle mass .engaged in slivering or work and the

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