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

Phylum platyhelminyhes, general classification of phylum platy helminthes

general classification of phylum platy helminthes

What is the significance of rhynchocoel, What is the significance of Rhynch...

What is the significance of Rhynchocoel? The unique body cavity of the Nemertean worms, which comprise the retractable proboscis. There is some debate on whether this is a true

Describe genetic recombination , Describe Genetic Recombination ? Genet...

Describe Genetic Recombination ? Genetic recombination, which provides the variation necessary for evolution, can occur through a variety of processes during cell reproduction:

Explain the term ageing, Explain the term Ageing? Ageing in human being...

Explain the term Ageing? Ageing in human being is of a multifunctional origin and there is a programmed senescence (ageing) of the cells in the body. The genetic make-up of an

Describe the need for harmonization in clinical trials, Question 1: Des...

Question 1: Describe the need for Harmonization in clinical trials? Brief on the Revised ICH terms of reference and explain the structure of ICH? Need for Harmonization i

An the heat capacity of water, Q. Can the heat capacity of water be conside...

Q. Can the heat capacity of water be considered small or large? What is the biological consequence of that characteristic? From Thermology it is acknowledged that the quantity

State the term - vibrio parahaemolyticus gastroenteritis, Vibrio parahaemol...

Vibrio parahaemolyticus gastroenteritis While most other known food poisoning syndromes may be contracted from a variety of foods,  V. parahaemolyticus gastroenteritis is contr

Define neural and neurotransmitter control, Q. Define Neural and Neurotrans...

Q. Define Neural and Neurotransmitter Control? Coronary arteries are richly innervated by adrenergic and parasympathetic nerves. Both alpha 1 and alpha 2 adrenergic receptors a

What is the etiological agent of amebiasis, What is the etiological agent o...

What is the etiological agent of amebiasis? How is it transmitted and what are the typical manifestations of the disease? Amebiasis is caused by the protozoan Entamoeba histoly

Illustrating how neuropsychologists evaluate young children, Illustrating h...

Illustrating how neuropsychologists evaluate young preschool children, older children, youngster adults, and elderly adults. The brain is an evolving organ and functions very

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