Prokaryotes and eukaryotes, Biology

Assignment Help:

Prokaryotes and Eukaryotes

By now, you know that cell theory holds good for all living forms. However, if you examine under the microscope, the cells of a bacterium, a blue green alga or a mycoplasma on the one hand and an amoeba, or a Chlarnydomonas or an individual cell of a multicellular organism, whether plant or animal. on the other, you will note a distinct difference between the two groups. You will not see a well formed nucleous in the first group of organism as they do not have a discrete nucleous and their nuclear material is not surrounded by a nuclear membrane.

You will however notice that members of the other group consisting of amoeba or Chlamydomonas or an individual cell of a multicellular organism whether plant or animal are characterised by a distinct well formed membrane bound nucleus, called karyon (also written as caryon). From an evolutionary point of view, absence of the membrane-bound nucleus is considered primitive while its presence is deemed advanced. Therefore, biologists have coined two separate terms to denote the two categories of organisms i.e., the prokaryotes or procaryotes whose cells lack a membrane-bound nucleus and eukaryotes or eucaryotes whose cells have discrete nuclei.


Related Discussions:- Prokaryotes and eukaryotes

Plasma membrane proteins, Integral plasma membrane proteins are also synthe...

Integral plasma membrane proteins are also synthesized by ribosomes on the RER, but become inserted in the rough endoplasmic reticulum membrane rather than transported into the lum

Define role of nutrients in controlling gene expression, Define Role of Nut...

Define Role of Nutrients in Controlling Gene Expression? The role of several nutrients in controlling gene expression, as mentioned earlier, is in infancy, but with advancing b

Explain the dna structure in details, Explain the DNA structure in details?...

Explain the DNA structure in details? Structure :  Each DNA molecule is a double stranded polymer, consisting of perhaps thousands or millions of linked nucleotides. The two

Cyclostomes - regeneration in vertebrates, Cyclostomes - Regeneration in Ve...

Cyclostomes - Regeneration in Vertebrates The larvae of the lampreys between the jawless primitive fishes are able to regenerate their amputated tail. Blastema is made at the

What is the constitutional unit of proteins, What is the constitutional uni...

What is the constitutional unit of proteins? The constitutional units of proteins are the amino acids. Protein Structure Review - a) Image Diversity b) amino acid stru

What are the technique of operation in cps, What are the Technique of Opera...

What are the Technique of Operation in CPS? Percutaneous balloon valvotomy is the procedure of choice at any age. If this is not feasible, open surgical valvotomy is recommende

Degrading monoglyceride, Degrade a monoglyceride that has an 18-carbon fatt...

Degrade a monoglyceride that has an 18-carbon fatty acid attached to it by Ester bonds. You will have to degrade the glycerol component followed by the fatty acid in presence of O2

Give some examples of secretory cells?, Endocrine and exocrine pancreatic c...

Endocrine and exocrine pancreatic cells, thyroid and parathyroid endocrine cells, adenohypophysis, adrenal and pineal endocrine cells, the lot of types of gastric exocrine and endo

Heart failure, It is a clinical syndrome wherein heart fails to pump blood ...

It is a clinical syndrome wherein heart fails to pump blood at a rate required by the tissues of the body or it can do so only with an elevated filling pressure. This may be due to

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